Where can I do a border run near Hua Hin for my multiple-entry marriage visa?

Hi all, I'm going to have to do my first border run this year and was hoping to do it from Hua Hin. However, it seems that the agency there goes all the way up north to the hight of BKK and then goes to Myanmar border up there, in the Kanchanaburi province. As Im very restricted in my travelling, does anyone know if there is also a border crossing closer to Hua Hin (it's not far from the border) where you can get a stamp?

I will have a multiple entry marriage visum so no need for a new visum, just a stamp.