HI ,There are literally hundreds of tanneries just east of Bangkok, they employ over 100,000 thais,
so maybe you need to look harder
Id say it will be easier once you hit the ground in bangkok as thais arent that internet savvy yet.
I dont think you have a problem finding a distributer or 2.
Im having trouble finding what im after here in australia, so im looking international and will seek out thai sources too
and let you know if i find anything.