2nd Gen, Leaf Spring Insulator Pads?

my leaf spring pad wore out and i hear metal on metal when going over small bumps at slow speeds. service shop said that it's definitely the noise i've been hearing but toyota doesn't sell the pad's themselves and only does the leaf spring replacment (about 1K). I can't seem to find the right pads online for my 2013, the hole on the bottom is more oval than a circle, which i'm finding plenty of small circular inserts. Seems like it would be a $5 part at most, has anyone been able to locate replacements?

 

I wonder if 3 Gen pads would work on the 2nd Gen?
The suspension is pretty close to being the same.
If so, you could probably just order the “TSB” parts?

 

thanks! i'll research further.