Where to buy dry rock in Thailand?

Hi guys,

Gues the title says it all, im looking for dry rock in Thailand. I have spend countless hours trying to find preferably a thai shop sell but also a us shop, that would ship international, and amazon does indeed, if your paying 3-4 times the price of the rocks. :-/

Also been at jatjujak market and i am aware i can get plenty of liverock buy my experience is full of critters ;-) so time to cure some dry rock.

Anyone who can help? Much appriciated.

Thanks
Rob