mikuni bs38 carburetors

I'm looking for alternative carburetors that are out there on the market that can be bought from the factory and with a little adjustments work on the bike without having to pay $$$$ Maybe something around the $$ to $$$ range. I keep seeing 34mm carburetors on Amazon like this one Carburador...

After reviewing dozens of utuub vids on how to rebuild Mikuni BS38 caburetors, I vectored over to PepBoys for some chemicals, only to discover that they have closed their doors for a couple of months while they have changed company name and are remodeling all of the stores. So I bummed around...