I think a better question is will you find any legit RC *labs* that are NOT on the clearnet. Most them take bank and money wires, although some accept traditional e-currency like Pecunix or LR. Some also take credit cards but I would avoid that. Most of them are based in China and also make non-recreational chemicals as well. Also if you really are trying to find a lab be prepared to buy kilo minimums of whatever you are looking for. On the bright side expect to pay only a few dollars per gram .