There are quite a few places you can go...

Here are some options:

ebay - stay away from anything that says ssautochrome or obx

turbokits.com - http://www.turbo-kits.com/civic_turbo_kits.html
Not the cheapest and not the greatest on information. Most kits are not 50 state legal so forget emissions.

revhard - http://www.revhard.com/turbokit/civi...el=EG&engine=D

http://www.modacar.com/products/Hond...turbokits.html

http://www.sportcompactonly.com/ -greddy kit

greddy

and last but not least search the HAN forums and GOOGLE it!

Happy boosting
p.s. rule of thumb 8psi = happy pistons >9psi=engine build or molten pistons without proper tune or turbo size.