While other guns usually can be changed by removing a small part Ruger changes a part for another and only they will do it .You can't buy the part . You send the gun to Ruger ,they replace the part and return the gun .Give them a call.
I also hate auto safeties !
I keep meaning to send my Red Label to ruger to eliminate the auto safety, but I never seem to be able to get it done. It's only been 18 years, so I guess I'm just going to live with it.