Just wanted to toss this out there.
I recently ordered a Tyler T-grip adaptor from Tyler manufacturing. They're a bit old school and still use printed order forms and U.S. mail.
I mailed in my order form and check. My new, well packaged T-grip adaptor showed up 1 week later (maybe only 6 days).
I've ordered from Tyler many times over the years and I've never had a problem. They do manufacturer their products in batches so occasionally if you order an item that is not in inventory you may have to wait a week or two more. I had that happen one time with a more obscure model.
While I generally prefer replacement grips instead of a Tyler T grip, there are times when the T-grip adaptor IS the answer.
So don't forget about that option if you're looking for a solution to improve a DA revolver grip.