mini pocket quad upgrade questions

hello im intrested in buying a mini pocket quad. i want one with the supsension...
1) where is the best place to buy one
2) is there any after market shock absorbers that i can put on because i heard that the stock ones are crap
i might make a custom rear swing arm for it that extends the quad 6 or 8 inches back.. but if i but say like a 12 inch shock absorder on it would i have to increase the size of the front shock absorbers.?

Where to get one is hit and miss from what I understand. I got mine from MPR and got boned big time on it so I don't recommend using them. I don't have any problems with the shocks other than the front is s little stiff which doesn't really matter because the front is not even a functional suspension, its just there for looks. As far as I am aware mountain bik shocks should fit on it so long as you get one of the correct length.