I am still not having any luck with a good fix for this. I can't find much infromation about Crane plumbing stuff (except toilets) on the internet.
I did make a bigger spacer that puts the handle a bit farther from the wall cover plate and allows it to be tightened a bit more which does stop the drip but it doesn't feel like the right thing to do long term.
I did e-mail Dinapoli as was suggested above but they replied saying "Thank you for your inquiry but we can not supply this part anymore." I am also still waiting for replies from Alfano and Danco in the hopes they may have suggestions/parts.
Any thoughts from anyone on the forum for other courses of action?