URGENT HELP! B18b Stuff

Alright, I just got a 94 GSR with 113K...Now, i want to swap out the B18c and put a B18b, bc later on im going to boost it(15+) I want to sell the b18c to some ppl for 2g's...now, should I sell it and get a b18b..or keep it, I want to get a B18b, but i know im going to have to resleeve it and all that...i dont have the time right this year( in school)...also, is there anyone that knows of good place to buy or someone that already had a resleeved b18b...all i really need is it to be resleeved, i can do all the rest, pistons and such...PLEASE HELP...My AIM is Twista616, much easier to talk that way... thanks!