I do not know if you are looking for a gun, ammunition, or components. I apologize in advance if this post is out of line.
I am also interested in this caliber. It seems like it would be a drop in conversion for a 10mm Glock or Delta-Elite. I inquired of Bar-Sto barrels a few years ago and they catalogued barrels for the Glock and said they could supply barrels for he Colt. I think dies are available. I have never seen factory ammo for sale, so it is likely a handloading proposition.
I saw a custom gun in this caliber for sale at a gun show in Sacramento about five years ago. It was an IPSC Race Gun.