how much of that side shim stuff do you need ? i have a bunch of that stuff in my "wiper parts" drawers. hundreds of years ago, i attended an auction and ended up with a lifetime supply of blades and refills, and used up a bunch of it already, but still have three drawers full of stuff ranging from 6-24". many times, i have taken the refills apart and used the rubber without needing the shims [side reinforcements]. let me know how much of that stuff you need, and i'll send it to you, gratis, provided you can wait a few days.