I'm looking for about 6 floats as shown in the pics.

I'm in BKK (Asoke area) and would obviously like to find them close to home, or buy from someone who can send them via post. Size isn't critical, though these marked Size 6 (I think) would be good.

The application is not related to fish farming at all, so I'm a rube when it comes to these things.

Suggestions? Any websites that take orders for mailing?

Try Angus at Farmaqua,they look like the floats from a paddle wheel aerator so Farmaqua may have them as a spare part.