I've seen the door handles on ebay for like $18 - $20 each or so. I haven't seen any place with aftermarket carpet, so your best bet would be to find a good used carpet if yours is totally trashed. I look on
http://www.car-part.com" onclick="window.open(this.href);return false; for a lot of parts at local salvage yards. Just look on there for a few Vibe parts and call to ask about the carpet.
What is wrong with yours? If it is just dirty or stained, I've had good luck washing the carpet in my Mustang several times. I actually cut it into 3 pieces and washed it in a commercial size washateria washing machine.