I'd like to take a cruise of Thai coast & ports & possibly some other SE Asian ports.

Have done Google search & TV Search on the subject. Nothing seems available

Dont really want a luxury ship, but just a local freighter ship would also be fine. Just want to explore the coast & pass the day sitting on deck reading, relaxing or watching.

Anyone one know of any local (Thai) ocean freight co.'s that offer passenger accomodations.

I was looking for the exact same thing but i was not able to find anything myself.

Anyone knows anything about it?

Try googling Star Cruises. That's one that goes around SE Asia. There's another that's supposed to be better but I can't remember the name.