Toyota may still have new carpets remaining in stock, very expensive though. There are aftermarket carpets available, don't recall who; try man-a-fre or SOR.
Most of us call Dan at Parts in American Toyota in Albuquerque NM, or Lowe Toyota on the east coast. Both know their parts and offer great discounts to mud members.
Unless yours is totally trashed I think you'd be amazed at what a pressure washing will do. Mine looked pretty bad, I pulled the whole thing, soaked it with purple power, let it sit, and then was patient about blasting all the soap out and going over the whole thing. It's like a new carpet now. I looked at OEM and aftermarket options before deciding I had nothing to lose by trying, and I am glad I did.
This is a message from Cdan when i ordered my carpet
Re: replacement carpet
Yes, you can get the front section only. It goes from the firewall to the back edge of the second row seats. The front section lists for $626.08, net $469.56.
x4 on the clean instead of buy.
I used a product called LA Awesome. it's cheap dollar store stuff but it works miracles. honest to goodness.
tore all the carpet out, laid it out on the garage floor, sprayed the LA Awesome stuff on, waited for about 20 minutes and proceeded to pressure wash the hell out of it, and they look damn near brand new.. 93w/245K on the odometer. http://www.lastotallyawesome.com/
I don't post the price I have seen requests from Lowe Toyota not to list prices. Just trying to respect the vendors I have used and have treated me well.
FWIW while the carpet is out you could add carpet underlayment, or just replace the old jute if it is falling apart, with something that has an aluminum foil layer bonded to it, there are a few brands out there. I've found it cuts down heat transmitted to the cabin from the engine and cats.
CruiserDan and SOR are great. I'm getting parts from them for an 80 series project right now. Also check out CruiserParts.net and Toyotapartsovertock.com (TPO). I just got carpet from TPO. I shopped around and they had the best prices. Front piece was $470.99, rear was $231.46 and wheel covers were $55.66 each. Prices on TPO vary. I dont know why. It all depends on their inventory. I had no carpet to start with. Former owner trashed the truck and stripped all the carpet out. I considered used carpet from CruiserParts. Also called Grahams Automotive in Calera, AL (Grahamssuto.com). But TPO had the best prices. You ought to put in Dynamat sound deadener, at least in the back. Worth the extra $$$. All this is DIY work. Good luck.