Holster for Ruger Single Six .22 with 6.5inch barrel.

[Forester]

Hi All

I have a customer that wants me to make him a holster for a Ruger Single Six .22 with a 6.5inch barrel, but it also has a red dot sight as in the attached photos. Has anybody made such a holster that would kindly be able to share the pattern/template. The extra problem I have is that he lives in Northern Ireland and I live in England, so I will be making the holster (if I agree to make it) for a pistol I don't have a replica for. I have replica's of Colt SAA's, are they roughly the same size. All comments and help are appreciated as usual.

Regards Forester