The Stovebolt Site Forums The Shop Area Driveline Overload leaf spring rubber replacement, help!

Hubby bought what he believed to be the correct rubber pieces for the leaf and overload springs for my 1946 Chevy 1/2 ton [based on the information provided by the rubber company's website].

They're square - mine were rectangular.
Their lip is tall - mine was short.

Mine were too badly degraded to get measurements from (and we're not even sure of their exact name, to research), but we definitely had to pry them out of the "rim" around my metal bits. In other words, they were definitely rectangular, and definitely had a short/thin upside-down "T"-shaped lip...like the ones hubby bought (only they're way too thick/fat).

What have you used to replace these four rubber parts?

Is there a proper name for them that will aid in our search?

How tall should both sets be to function properly?

I'm reaching out for help here because, when I emailed "Steele Rubber Products" to tell them the parts didn't fit and ask if they had any rectangular-shaped ones/measurements for rectangular-shaped ones, his last reply was; "Yes, that measurement would be needed. I would have to confirm with our technician at the shop to verify. I work from home so I cannot measure it." These four, small pieces of rubber literally cost six times more than our water bill - Are we measuring? Are we following up? What are we doing? I guess I should have let hubby do the emailing because I feel like this gentleman thinks I'm just being a pain. No, I just want to replace these four parts correctly so we can start putting the rear end of my truck back together.

Photos include:
The parts I'm trying to fit (not exactly sure what to call them).
The rubber part they recommended/hubby bought.
What's left of my originals.
A size/shape comparison of my originals, and what they recommended.
The "lips" that we had to pry the badly decomposed original rubber pieces out of (that their recommended replacements obviously won't fit).

I realize that we could shave off whatever we needed to but at $135 with shipping for four pieces of rubber (and not even being sure of the correct/original height) I'm returning them for a refund vs altering them.
(Yes, my truck has overload springs...that was a question he asked even after I sent these pictures. It's an old farm truck. It will be my daily driver most of the year so I want it to ride/sit properly).

Thank you in advance for any help!!
Maria