Rear Wheel well factory spray

Does anyone know what Toyota uses? Or has used a product that matches closely to the original Wheel well factory spray. It's thick, beige in color under the factory paint, porous and spongy. I had to remove some of it to fix some rust holes and I'm very particular and want to make it look like I was never there.

Thank you for you time and advice!!!

 

Have you tried the dealer?

 

I came across this while looking into undercoatings. There are other brands, like 3M. The big cost is $250-$300 for the correct spray gun. Others have suggested going to a private body shop and asking if they can “touch up” some areas for you.