nostr:npub1wmr34t36fy03m8hvgl96zl3znndyzyaqhwmwdtshwmtkg03fetaqhjg240 shared https://relayaas.com/ at Nostrasia but not sure if thats open to the public or if its only for fundraising. Looked pretty well developed though.

We (nostr.wine) host a few 3rd party company relays and will probably eventually offer individual relay hosting too but hasn’t been a priority yet.