What are some sites that have parts for making an amplifier? Please only places that ship to the states.
I ordered all of my stuff from Mouser.com, tubesandmore.com, and hoffmanamps.com.

You can also get kits from http://www.dockeryamps.com/web/products.php, www.ceriatone.com, and https://taweber.powweb.com/store/kits.htm

If you go with a BBQ Kit, purchase a different rectifier from one of the other places I mentioned. The ones it comes with aren't the best.

Just out of curiosity, what are you building? Have you built anything before?
American Ash Deluxe Tele
Squire Standard Strat w/ Texas Specials
'65 Fender Deluxe Reverb RI
'53 Fender Deluxe 5C3
California Dreamer
Valve Junior
2X12 Avatar w/ V30's