Here's the per injection price for Shingrix from the Thai Travel Clinic at Mahidol University near Victory Monument BTS in Bangkok:
One good part among many with the Travel Clinic is their add-on charges for doctor consult, etc are very modest, just about 300b more on top of the vaccine-only price above.
https://www.thaitravelclinic.com/cost.html
FWIW, while I don't know what total all-inclusive price Bumrungrad might be charging for Shingrix.... some months back when it came to the COVID XBB vaccine, Bumrungrad's all-in pricing as a large for-profit hospital was more than double that of the Thai government university-affiliated Travel Clinic for the same vaccine.