There are actually many sources bro, especially online, 1010tires.com is one.
One thing is sure, it takes a lil longer searching for varied diameter sizes, such as 245x*40x16…lol
Oh…I believe with 0 offset 16x8 the wheel will be sticking out of the fender somewhat with that type of rim measurement, that’s with stretched 205 rubber too lol. Camber adjust can correct it I’m guessing.