The local places I've been to recently all seem to be back to normal. They don't have some of the more niche stuff like some Kyosho and CEN stuf but they have all the Traxxas and Arrma parts
I get all my new stuff from Amain assuming they have the part I'm looking for (which they usually do) or from local shops if I need something and I'm in the area of one. As for used stuff Ebay or personal transactions