TRD Pro oil filters -- who makes them?

I've been trying to figure this out. Obviously Toyota contracted with someone to make them. I noticed they look a lot like the Amsoil filters -- but it turns out Amsoil also contracts with some third party for their filters. Does anyone know who it is? Wix?

 

Last I knew, Champion labs makes Amsoil and Royal Purple which are identical to the TRD filter except a different color o ring.

 

Add VP Racing to the list of the same filter, with different color o-ring. Champion Labs list 2 different filters, P967, and P967XL, the photos show the same filter, neither look like the TRD filter. Not sure if we can get them direct. I have 1 more TRD and I am out. Ski

 

I ordered a few of the amsoil filters after using up my last few trd in the stockpile. I ended up returning them, the quality was inferior to the trd filters I had, and the amsoil filters aren't cheap. Rusty metal caps, excess glue dripping from under the caps, loose threads in the seams, etc.

The amsoil filters were also made in a different country than the trds I had.

I'll probably try the RP on the next oil change.