If you do an online search for autopart, you can usually find some places selling hoods, headlight, fenders, and bumpers.

I assume these parts are aftermarket replacements used by body shops. Bumper run about $200 ea. Hoods can also be found too, I'm unsure of the quality of the sheetmetal in the hood. I wouldn't worry too much about the bumpers as painting and priming can hide most cosmetic sins. But poor metal stamping may be bad. I'd consult a local body shop that would paint your kit. They may be able to find used parts for you.

I have a thread somewhere on this topic, the non-OE 98-00 bumpers with links.