The "special" RC carpet is from Calandra racing concepts, called Fasttrack HD. The only thing really special about, it is treated to be static free. If you use spektrum receivers, static glitching shouldn't be an issue.
Its about $7 USD a square yard (or about a square meter) Probably about $4000USD for a decent size track and then you have to pay for shipping out of the US probably another $3000USD,
My choice would be to buy some cheap commercial grade carpet locally and treat it against static