As you've already discovered this isn't an easy thing to accomplish!
Let's have a look at your requirements one-by-one:
Would not be too expensive
Air is cheap, I can't speak for India but here in the UK I can fill four tires with sufficient quantities of the stuff for a few pence.
One of the downsides of the airless tires that Michelin, Bridgestone and others are developing is the fact that they are noticebly more expensive than pneumatic tires.
- Would be able to support the weight of the vehicle and the rider
Not really a problem - airless tires such as Terrainarmor from Reslient Technologies are often designed for heavy loads.
- Would be easily procurable
Ahh.. here's the rub, many of the consumer-orientated airless tires aren't on the market yet as they are still in development. The Polaris Terrainarmor tires can be bought - but only in the form of the complete wheel assembly (for the Sportsman ATV) and they aren't cheap at $1049 each. The commercially available foam filling materials aren't approved for road use (other than the temp tire sealant foams - and they are for extremely limited mileage) and are aimed at tires on big off-road machinery such as Tractors. You can't just walk into your local motor factors and buy a can.
- Would not add too much weight to the tire
It's going to add weight, there's nothing you can really do to avoid that. There aren't many substances lighter than air! The most relevant comparison I could find is for the difference between using an AirFom insert vs. a conventional innertube on a bicyle - 75g per tyre. Since motorcycle or car tyres are substantially bigger than bike wheels expect that difference to climb.
- Would not compromise on traction or safety
The additional weight be considered "unsprung mass" which is likely to result in.. interesting effects on the suspension characteristics of the vehicle, possibly reducing safety in the process.
- Would be able to dissipate heat reasonably quick for a continuous commute of approx 40Km
Another problem - airless tires of the "filled with compressed plastic" type as used on heavy plant machinery have a real problem dissapating heat. The airless concepts that the major manufacturers are working on seem to do better in this regard, although there's precious little data on that aspect. A Terrainarmor-type design avoids this issue by being open-sided.
The closest you'll get would be to fill with something like TyrFil™ Flex which is a low durometer polyurethane foam - it offers better flex than a solid aperture airless tire - but it's that's relative. Despite the marketing many users have reported that it provides a very solid-feeling ride - and that's in heavy OTR vehicles like tractors! I would expect on something like a car or motorbike it's going to be basically solid. And while you might never get a puncture or blowout you are going to have damage done to the vehicle from the transmitted shocks, not to mention it will be unbearably uncomfortable!
So basically as technology currently stands the answer is a resounding "No" - there's nothing you can just fill your regular tires with that meets your requirements. It won't be long before airless tires become available for consumer vehicles though, but expect them to be expensive and only available for limited applications for quite a few years yet.