Aka "Rigid Foam." Hopiing it can be found in a Homepro or similar. Supposed to be good for covering a window as it pressure fits in the sill.

Seen it at Thai Watsadu polystyrene sheet if  thats  the type you want, various  sizes 

You don't say where you are theirs a stockist of polystyrene sheet in Sukhothai New City.

Ah yes, that would have been helpful to note. I'm in Pattaya

You need an arts supply shop but where....

 

I only now in BKK.

i need maha sarakham this board too, north thailand, were have. same i has try search 10-20mm aluminium sheet ewerywere many city but no have anywere. need build my cnc machine but now wait aluminium sheet 2 year and no found anywere. same try search polyfoam sheet 3mm 5mm 50mm many shop but anywere no have, thailand have big <deleted> country because not have normal parts what men need, homecountry if need metal,aluminium,foam,styrofoam,etc sheet have ewery city and ewery hardware shop. thailand when go home pro, all self have empty and watsadu no have anythink what normal need. woodwork.metalwork.RC aircraftwork,cnc machine build, elektric,transformers, anythink normal parts no have anywere, big <deleted> all thailand.

1 hour ago, finnishmen said:

i need maha sarakham this board too, north thailand, were have. same i has try search 10-20mm aluminium sheet ewerywere many city but no have anywere. need build my cnc machine but now wait aluminium sheet 2 year and no found anywere. same try search polyfoam sheet 3mm 5mm 50mm many shop but anywere no have, thailand have big <deleted> country because not have normal parts what men need, homecountry if need metal,aluminium,foam,styrofoam,etc sheet have ewery city and ewery hardware shop. thailand when go home pro, all self have empty and watsadu no have anythink what normal need. woodwork.metalwork.RC aircraftwork,cnc machine build, elektric,transformers, anythink normal parts no have anywere, big <deleted> all thailand.

Regrettably your English is extremely hard to understand. That certainly could be a large part of your difficulty. I certainly can’t understand what many of the materials you are looking for are.

 

polystyrene sheets are widely available just ask any school where they buy them, this is the standard size.

RC parts are available from Banggood and other similar suppliers, woodworking tools are available from thaicarpenter among others. Khon Kaen and Bury Ram have good shops, I’ve no idea about maha sarakha itself.

 

from your user name I would assume that you are from one of the Nordic countries. You will find that if you write in your own language and use google translate you will get a result that is much easier for English readers to understand.