Sta-Rite pump stack rebuild

I'm trying to rebuild the pump stack for my Sta-Rite HP10E. The white impellers were totally melted. I know I can buy a new pump stack (P325-439R), but I am hoping to rebuild with the individual parts. I can find the white impellers (P105-95P) and the deeper clear part that the impeller fits into (P1-168P) to purchase online. However, I can not find the kind of clear "cap" that fits on that (P101-328P, bottom of photo) anywhere. Why would two of the parts be available but not the third? I am hoping maybe P1-168P includes that cap, but I can't find any photos online for that part to verify.

Does anyone have any ideas? Sta-Rite/Pentair is unhelpful.

Why not just buy the stack kit? Are the components individually that much less expensive?

GoBuckeyes said:

Why not just buy the stack kit? Are the components individually that much less expensive?

Click to expand...

For about $285 w/ shipping I can get all of those two parts. The cheapest I can find a pump stack is $565 w/o shipping (from Kleen-Rite - most other places are ~$100+ more than that even). So, it could be that I'd be saving at least a couple hundred.