thats kinda why KYC is so big now if you find an exchange that only does cryptos, then they generally dont need KYC
if you just mean a site for tracking, try livecoinwatch
He said, he wants to convert the usd to other stable coins so he asking a good exchange to be used for converting the token.
DEX can be an alternative to avoid KYC exchange, or you can use OTC Trading with someone who has the token.
Just used escrow from the third service like Bitrated or Trusted People who have a good track record.