I don't know if this will work, but
When we were putting in our centralk vacuum, there were pipes that went in the wall, looked just like pvc pipe. But, they were a slightly different diameter, that way we had to buy THEIR pipe, not just use plumbing pvc. I don't remember the sizes, but if they had a size close to a pvc size,but not exact, it might work
(central vacuums and all the innerds needed, such as the pipe, we got at an electrical wholesaler)