Needing 621 scraper seat suspension assembly

My seat suspension assembly packed it in today, and I'm stuck looking for a replacement. Nothing's available from Cat directly or the aftermarket that I can find. I need the seat suspension assembly shown in the pictures or part number 5D9204. Nothing else will fit what I've got. If anyone's got a 621 parted out and can help me get this part, I'd really appreciate it. Any leads would be helpful.

I don't know much about Cat 621 scrapers, but a lot of farm tractors use rubber torsion springs for their seats. Steiner tractor parts carries a pretty good selection of those, so you might find something that works. Let me know if that's not what you're after.

I've got info on a couple of 621s around here. You interested in machines that have spare parts? One of them was running when it got parked, but it's been sitting for years.

You might find the 5D-9204 Spring assembly listed on both 777parts.com and avspare.com.

Yeah, that could do the job for me.

Thanks, I've submitted a parts request.

Does anyone know where I could find either of those two machines nearby? I'm located in Montana.

Nope. Near Tulsa, OK.

Some suppliers say they have the 5d9204, but they're all out of stock and would need to order from Europe.