Recently purchased a 112 j series (single shot) in 223r. I have put a Sav-2 trigger on it along with a one piece rail with a Viper 4-16x44 mrad scope (low warne mounts). Bedded action. I was looking to rebarrel with a Criterion in the 6.5 family (shooting up to 300 yds primarily, and to 850 at times). Problem I'm having is the larger bolt head can't be found anwhere I look. Numrich has one listed but it has been out of stock for half of forever. Any ideas or suggestions for the change?


Part I need -
http://www.gunpartscorp.com/Products/141820A.htm

Thanks in advance for any and all help!
Kevin