Delta ring replacement

I bought a broken AR (Ruger AR-556) that had been run over and it was all simple stuff to fix, the buffer tube, the grip, and the hand guard were all messed up so I just replaced the buffer tube and grip, but the handguard was not useable and the delta ring was broke, iv ordered a factory hand guard but I can't find the Ruger delta ring

My question is can I buy a replacement ring that will thread on like the original or can I replace it with a standard ar delta ring