190D 2.5 to 2.5turbo

[KBCB]

I am playing around with the idea of putting a turbo on my 2.5l. i'd like to get a little more out of it. so here are my questions...
1. where is the best place to find a turbo and other parts necessary to hook it up?
2. can i just bolt all the necessary parts on and call it good or would i have to go through the engine, and beef it up a bit?
3. what are some general thoughts about doing this? has anyone here done this before.

thanks for your guys input.