I find the Thais much worse for extras than Brazilians. I have found that if a Brazilian takes a shine to you you can be in for an amazing punt.
Finding any SP who is into you is always a better bet.
Current strain of Thai newcomers (from LoS or from circulating the UK provinces) rarely seem to match the standard that was London Thais. Sadly all now are picking up bad habits from the Brazilians and wih the constrained supply the better ones are getting more and more merc. Best mileage is if you already had them as a reg. A shame for those new clients who don't mind plastic padding, otherwise seeking new, natural talent is like the rear areas of Ukraine, no matter where you may've been there are new mines to avoid.
Most Brazilians are getting worse with the extras but sometimes a more obliging gem can be found and not always in a flat or a bhouse. But it's like hen's teeth and so many new and pretty faces to frustrate a search, again plastic lovers might have it easier to select but there's more failure with more attempts.