That’s bad timing, I’m not in any real hurry so I’ll leave them up here for a bit before I try Ebay.
My mate the mechanic thought this nasty ring in the rear cyl would hone out ok, so I went ahead and bought all the rings, when it came time to hone, all the other cyls came up fine except the one with the ring[:(]
So my lesson is to not do anything until you’re 100% sure its ok !!