Does anyone know where I can find small amounts of polymerized tung oil in relatively small amounts?

I'm looking for polymerized tung oil---that is the kind that is polymerized with low-oxygen environment heating, not with chemical dryers. I've found some but not in the relatively small amounts you can get the "tung oil finish" for in the hardware stores.

(To be clear it's slightly more processed than the "%100 tung oil" products that are easy to find )