I have an old battery left from the old car and I need a jump starter kit. It seems all jump starters have integrated motorcycle battery inside. I curious whether jump starters with a place for a car battery exists? It will be even better if they sold without the battery, so I can use my old battery (I save a lot of money on that since I'm in Siberia and to deliver jump starter here cost me twice of the price of the jump starter itself).
You don't really need a kit for anything other than convenience. All you need is a pair of jumper cables, which you can make or purchase, and you've got your jump starter right there.
I would also purchase a trickle charger to keep my jumping battery charged when not in use. If you really want to get fancy you can make a cart or a box for it, for easy storage/use.
I've found it! Battery box with "some modification". There is DIY video: http://www.youtube.com/watch?v=7Tf3fngKA-c