I went to an appliance guy on 3rd road who I've used in the past. He said no one close by has blender jars, but there is a place across from the Naklua post office that does. I found the place and they wanted 1,100 baht, no budging. The blender itself is 2,200 baht so they were asking half price.

Unless I find a new place I am thinking of just buying a new blender for the jar. I blend heavily and a backup unit would be nice.

Does anyone know a place that stocks blender jars at reasonable prices?

collingebournes auction often have the whole thing for next to nothing

Just a guess...there is a kitchen supply store across the road from Royal Garden Plaza on second road. They have a lot of stuff so just maybe...Good luck.