Do regular autoparts stores carry metric? (NAPA, CarQuest, etc) or do I have to mail order it?

Does it really matter?

What have you done?

If I remember correctly, NAPA sells metric hose. In some cases it doen't matter as long as the hose fits snugly but some lines don't have a close enough American size to fit well. Good luck

I went to my local "bug" shop. They had every metric size and it was cheap ($1-2/foot).

Yep, yep... Bug shop is your best bet.

Unless you're a concours weenie. Then your only option is to call AA and ask for their colored vacuum line set.

-Rusty