Okay, I just got an email from a contact from a major retailer's signage department. (They had the free sintra awhile ago.)
They now have a whole load of PVC pipe they're going to throw if no one takes it, like by today (Tuesday).
"1/2 inch, 45-55” long, very dusty.
And it turns out we have about 400 of them, with another 100 or so that are 10 ft long, or whatever the full length is when you buy them at the store.
They need to be gone by five today!"
I imagine that's "plumbing" 1/2 inch, not a normal 1/2 inch. If anyone's interested, shoot me a PM and I'll hook you up. The warehouse is located in Eden Prairie.