I'm trying to get a little parts line going...
I've made some jockey shift knobs and would be down to send you one on the house in trade for some pics and a review. Not the the grenade isn't sweet lol.
Here's a couple I've done. One all aluminum and one with a hand tooled leather inlay. Hope this isn't weird, I just figure the easiest/quickest way to get a name out there is to give some shit away.

they are tapped for a 3/8ths 16 thread, which is pretty common...