Kickdown lever

Update on the OD piston I didn't get.
I have this trans apart at a neighbor's shop, since he has a real trans bench ans the spring compressor for the clutch packs. And was one of a handful , that strongly recommended getting my parts from that company.. I went over there last night and told him about this runaround ive been getting from them
His response was "let me call MY rep there"
I tried his rep to start with and she didn't seem to have any idea of what I was wanting. Tried to sell me the wrong converter, and the wrong neutral switch right off the bat.
Well the answer from my neighbors rep is that the OD piston is supposedly discontinued... WHAT? As many of these transmissions are out there? And the part that the piston fits into, there's a gazillion of those available everywhere.
I looked on eBay and found exactly 2. Both used.
Why couldn't they have told me that when I was standing there? And why did I have to go to 2 locations to get the rest of my stuff that I had asked for at the first one?