Are there any currently commercially available grip safety options that will work with GI style spur hammers?
The height of grip I get with these are ok, but the tang digs and makes long strings painful.
I’ve seen custom grip safeties by Heirloom Precision, Hoag, and Pistol Dynamics, but they don’t seem to be commercially available.
I’ve also seen the rubber covered Pachmayr ones but they give a lower grip then stock and just dont look right on a GI.
A good dehorn will cure your ills…
This is from Grizzly Custom Guns, but John Harrison does something similar. Get a hand file and some Emory cloth and knock off the offending edges.
I’ve never seen one. Probably have to replace or modify your current hammer. Are you trying to avoid cutting the frame?
What pistol are you talking about here?
I’ve seen this pic but had not noticed the treatment, I thought it was just another GI tang pic. Looks to be worth a try. 
Redhat, its just a Norc GI that will be primarily a GI themed range gun. Though I plan to spec it out with good parts (EGW custom bushing, EGW bar stock slide stop, C&S spur hammer set and hammer strut, Wilson bullet proof extractor, Novak bar stock thumb safety, Harrison retro sights, etc) so it can pull emergency duty, as more of a range gun a concession to vanity I am making is to make it look as GI or at least period correct on the outside as much as possible. If this were a carry gun it would get a blended beavertail no doubt. As it is I carry a Glock 19 everyday. 
You might call Jim Hoag. (818) 998-1510 and see if he sells them. I have not seen Heirloom Precision’s (even though I know two of the three owners), but Hoag’s and Pistol Dynamics require the “tangs” on the frame be radiused, just like most beavertail grip safeties.
I agree that doing some filing and polishing might just be the best first approach, and the cheapest. Otherwise, like az doug mentioned you might give the folks you listed a call and see if they will sell you one of theirs.
Thanks for the suggestions guys!
Browsing on-line, I saw more pics of GI tang re-shaping. Here is Hilton Yam’s version that I will be copying to try out.
If that doesnt work, then I will be contacting Jim Hoag or maybe have a local guy copy someone’s retro grip safety.
my retro with a tasteful dehorn. never bit me once. and that’s odd, since i get a really high grip, and my hands are big. long strings of fire never bothered me.
John Harrison built this Colt for me late last year. I asked him to retain the Colt stock grip safety but dehorn and reshape it so it won’t bite my hand. He did a superb job, combined it with his very own bobbed hammer design, that it makes me forget that I don’t have a beavertail.
Beautiful firearms, gentlemen!
Thanks for the pictures and suggestions, all saved for inspiration for my own build.