Looking for new Mini

I did not yet manage to make an undertray for my crt, but I did put on some skids to prevent dirt coming into the chassis.

Also put some skids onto the rear arms. I'm also looking at shock socks. Any idea where I can find this elastic material cheap ?

I'm alos using one of these lipo's : FullyMax 2200 11.1v (35c/60c burst). I like the dimensions of it 26.2 x 35 x 102
http://www.fullymaxusa.com/

I would like some more mah but with more or less the same size. Any ideas ?