About 12/13 years ago I was replacing my 8N rear drag link seals and decided to make a replica of the KR WILSON Installation Tool -see photo. It works perfectly and won't damage the leather or rubber. I made it out of H13 tool steel so it is tough stuff.
One thing we may be able to do on the new TOOLS forum is offer to lend/lease some of these 'specialty tools' many of us have made like this one. Donations to the NTC could be made instead of a rental fee but we can leave that up to the renter. Of course the understanding is too if you break it you bought it. Details can be worked out between the two parties involved that way the NTC won't be held responsible or get involved other than offering a place that members can meet and search for solutions to their projects. Just spitballing and thinking out loud here...
Tim *PloughNman* Daley(MI)