I pulled mine off the first of June and installed it on my father in laws machine. He's had is ankles fused and he said it was so much better for him to ride with it. I ordered mine on that Monday and got it by Wednesday. I just checked the website and it looks like they might be out for now. Just keep checking and they are definitely worth the upgrade.
I Have one my P3LE. They are great for preventing your foot from slipping off the pedal and when my hip starts hurting, I can turn sideways a little bit and still comfortably accelerate. I got mine in just recently. It was only available in red and there weren't many left. I heard that the owner has a severe illness. I don't know if they are in business or not, though. If they are out of business, you could fabricate one super easy from a gate hinge. That's what I started to do, myself. Heck, I might rig one up for my F150, LOL.