Source for flat compressed cork
 

I love the mounts that Ecuagenera use. They are perfectly flat and every one i've ever received looks the same. None of them have bark either.

I hate the way "natural" cork looks, and i want all of my mounts to look alike. I guess Ecuagenera use processed cork.

They wont reply when i ask if i can just buy mounts from them, so where can i get this compressed cork? Ive been searching for an hour and all I can find is regular cork.

I have seen the mounts you are referring to but I have never purchased one of their plants mounted that way.
However, I had a whole bunch of compressed cork odds and ends given to me by a friend who used it to make duck decoys. I did a few mounts with it and after 3 years the mounts started to disintegrate. I suspect the binder used in the compression process broke down but I do not know that was the cause for sure.
Just a heads up but my experience makes me avoid that stuff now.

Personally, I like raw cork bark, because a mounted plant looks far more naturalized that way.

Marylandcork.com is the primary importer of cork to the US, and "composition cork" is part of their product portfolio.

They claim it is an "extruded" product, rather than being glued. I have absolutely no idea what that means.

Do you think this is it? 403 Forbidden

Ive asked ecuagenera if i could just buy some and they ignore my inquiries. I dont think asking to buy their mounts is a big deal, but whatever...

I have no idea, as I've never seen an Ecuagenera mount! Why don't you call Maryland Cork and see if they'll send you a scrap sample to compare?

Or call Ecuagenera in Apopka.

I have seen people use cedar shingles, like you would use to clad a house. They would be flat and uniform.

I use the cedar shingles. They are great! Rough enough for the roots to grab on to and after many years when they do start to break down, all you have to do is glue one onto the back and you're good for another 20 years.
I drill a hole in the middle of the thick end about an inch in to run wire for the hanging hook. I then work with the plant to assess best mounting position and drill 2 small holes, one either side of the main stem just above the roots through which I run a small zip tie to snug down and hold the plant in place. After about 6 months, the zip tie can be cut off. Alternatively, you can use liguid nails and glue the plant to the shingle. This approach has worked great for me for years. I just prefer the zip ties because you have to buy the liquid nails in a tube and it has a short shelf life after it's opened. The zip ties don't go bad using them up one at a time.
I prefer this method on shingles over monofilament fishing line because of the straight sides on the shingles.

OP------
Was just poking around on some orchid sites and found another option that might interest you.
Louisiana Orchid Connection sells a lot of their plants mounted on cypress wood and they sell the bare mounts as well.