Arthritis in the spine - never heard of that one but I wish you well and hope you find some relief.
For ~$27 the M7X is very impressive. I have one for almost every model of handgun I carry because they are so easy to work with. For long car trips I snap it on at 1:30-2:00 belt line, with an easy switch to 3:30-4:00 when out of the vehicle. The gun locks securely into the plastic and is removed with a quick, but healthy tug.
Granted, the firearm is not a snug to the body as some custom leather, but for just kickin' it the M7X is tough to beat. It will carry you over until your custom leather from Del Fatti comes in two years later!
Pic here
Galco M7X Matrix Thermoplastic Holster