Are there any turbos out there for the E36 318ic? If so what are they?

None that I know of. If you want more power I'd look for a different engine.

sat in about 3 or 4 years i want a new engine for my 318ic, could i put in an E36 M3 engine?

A S50/S52 shouldn't be too terribly hard to swap in. The biggest issue would probably be finding an available engine.

I heard it was pretty expensive... and the i would have to change the suspesion and some other things... is that right?

the turbo on my '89 325i is a GM-4 off a 6.5 liter chevy deisel. but I bought the car modified already, although it has a BMW deisel manifold on it too. I'd put a picture up but don't know how.