I think I might still have a carb off the 75 rust bucket parts truck I have. I'm not sure it came with the truck when I got it, but I'll check. Dash, well that is pretty much any luv, but there is now a cap (fixes the top third or so of the dash) and those can be found on ebay fairly regularly. (Search for Chevy luv and you should find one) Hood, junkyards are the easiest for body parts. I don't have anything that isn't on a good truck or rusted to the point of no return or I'd offer. Door handles I know I have a few, interiors are not even that hard to fix.
On the carb, do check into adjusting it. Usually the holley carbs found on LUVs end up being rebadged Weber carbs. You can find typical Weber adjustment specs here:
http://www.carbs.net/Weber/adjust.htm and there is a picture (look at the 32/36 DGV series) here to confirm it is a Weber rather than an actual Holley. If you can get it tuned in better, you'd be better off keeping the aftermarket carb than going back to stock.