Rooster, thanks for the reply....
I did a bit of looking at case dimensions last night. It appears that the .22-204R is nothing more than a .222 Mag. I was looking to do something with my spare .223 bbls. Considering that the .222 Mag is not any faster than my .223 AI, this would be a waste of time and $. Just wanted to do something 'fun' with my .224" bbls and the .378" bolt face.....
However, the .22-204 AI 'might' be worthwhile.
A quick check of the reamers at PTG showed no such animal.
I'll send them a note today to see if they have one.......

thanks again

ron