I personally would hut around for gear outside of Thailand on e-bay or a like. A lot of older Large format gear is not so suitable for digital, thus there is fair bit knocking around.
I have a friend here who brought a lot of his studio over from Germany, he has a couple of Sinar's with lenses gathering dust along loads of other goodies.... I will see if he wants to sell anything and post it ?
Some relevant links:
http://www.adorama.com/http://www.teamworkphoto.com/http://www.largeformatphotography.info/http://www.kenrockwell.com/tech/4x5.htmGood luck with all the fun of 5x4 and developing it. I had many years of it and am happy to see the back of the film side of it.
Regards Adam