I got the carpet from Classic Parts, so whatever brand that is (I think it's the only one in there). I am very happy with it. It fit well, looks good, and seems like it should last. I went with the cut pile rather than the loop, I think stock is loop, but the old carpet was unraveling and looks like once it starts it never stops. Other people told me that would not happen with the cut stuff.
Good advice with the nuts and bolts, I replaced those torx bolts with regular grade 8 hex heads and I think I'm gonna be glad I did when it's time to replace the actual belts (which isn't far off). Hopefully the weather will get nice again and I'll take some more pictures.