5100's with Moogs and all new mounts/bushings

I decided to replace everything in the front strut assembly instead of breaking down my old struts and reusing parts. I have already purchased the Moog 81194 springs, 5100 billys and new strut mounts and bushing kits. I have been searching on here and on google to find lower spring insulators/isolators. Ours seem to be pretty much a rubber hose that slips over some of the bottom coil. I can't seem to find this part anywhere.

I know other people here have done the 5100's with the new Moog coils, so what have yall done for the lower insulator/isolator? Reused the factory? Or is there somewhere to get them that I am unable to find? I have seen Energy suspension makes an Isolator like this, but it is only .75" inside diameter whereas the Moog springs are .765" o.d. Would I be able to make a slit in these and use them?

Thanks for looking!