ShopGentei. Oliver made them under the pen name "Sly & Robby" - a brand he started while living in JP. I like the punk pad and the circle jerks pad as well [to go with your group sex vans shoes]
$25 shipped if I remember correctly.
The only thing I dislike about frame pads is that they always get bunched up when I skid. Sometimes when I hocky skid, I use the inside of my leg on the TT and it becomes a constant game of re-adjusting the pad.
I really like the woodgrain saddle and polka-dot frame pad. Makes it look like some extinct bird....