I called Espo with the intention of buying poly bushings for the leafs, but they talked me out of it. My volare uses an oval front spring eye that is prone to breakage, stock. Aftermarket replacement main leaves are round. I was told that if there were ANY doubt as to spring condition, any flaws would be aggravated by the harder bushings and teh chances that theyd break would be increased. I had that problem on my last Diplomat ex squad. Had a rattle in the back that I couldn't find the 1st couple times under the car, found it by chance one day as I was changing U joints, happened to look over and saw them broken. They DID leave me kicking myself though, by the time that I'd finished ordering my bushings, though.
I had taken 2 sets of leaf springs into the local spring shop, none had any busted leaves, just weak and saggy, so I asked them to get me 1 set rearched and slightly built up so as to raise the rear an inch-1-1/2" over stock, they could mix-n-match as they saw fit between the 2 sets to get what I wanted. They charged me $156 with the only new parts being binding straps and those plastic "hockey pucks" that they seperate the leaves with. They did nothing with the bushings.

So I called Espo to buy bushings, and all told, I have $225 in this set of rebuilt springs, and I coulda bought a new set of 5 leaf springs, bushings and all, for $150! Needless to say I don't use this shop's services any more. I called them for a quote to do the same for my 97 Ram 1500 4X4, THEY SAID $400-$425, WHETHER I TOOK THEM THE WHOLE TRUCK OR JUST THE SPRINGS!!!
Wound up going about 40 miles away and having it done for $300, and they did all the work, all I had to do was drive the truck there.
Anyway, I popped out the old front bushings and sandblasted the springs for my car (I didn't re-disassemble them), made sure to get in the eyes where the bushings go real good and put a few coats of POR 15 on them. HAd I known that this place was gonna scorch me so bad, I'd have stripped them down and cut the main leaf down from the 2nd set and reassembled them myself, or ordered a new set.