Penty Wheeler of Penty’s Gun Clinic In Tishomingo, OK made 2 spare bolts for me in October of 2022 copying John Norrell’s design. I provided the older style 10/22 factory bolts that John recommend. Both bolts Penty modified run very well. It took him about 5 months to get to the job with his current work load, but that was about half the time anyone else I talked with.