I can confirm that these speaker adapters work for my 3rd gen Tacoma. This could possibly work for other Toyotas that share the same bolt pattern for the rear doors. I used this for a pair of Alpine coaxials. I took a gamble, and it paid off. Would recommend for other Tacoma/Toyota owners.
Quality is top notch, hdpe. I installed threaded inserts for the coax speakers.
Ps. Thought I had photos for the door installation, but I don't. They fit though!