Ask to find agency

I must design and submit technical, Currently I haven't found technical and price of 1 equipment but I found where to buy on internet and I want to ask them have agent in thailand or not

How can I write to ask them please help me to create.

Dear sir
I have found your product on internet and interest it I would like to ask you that you have agency in thailand or not

Best Regards,
Mooyong

Please help me to edit this