What I've done for about all my scoped revolvers is to buy an Uncle Mike's synthetic holster for the revolver. Then I cut the top strap enough for the revolver to fit in (leaves a gapping hole in top strap).
Then I buy a piece of artificial leather at a fabric store.
Then, I take it to a seamstress in town and have here sew the "leather" on both sides and at the objective to the holster.
I did this initially to save weight on my African flights (heavy leather holsters). It's worked so good that's all I use on all my scoped revolvers and scoped Ruger MKII and MkIII.
These holsters don't look as pretty as the leather ones on HH, but they are extremely functional.
My original one was for a 7 1/2" FA .454. Had it for 15+ years. Now I have them for 8" DW .44, Ruger SuperRed .454, FA .475 (with UltraDot), S&W 6" .600 (UltraDot), 10" Taurus .500, 10" MK II & III.
I love them. They've held up in Africa, AZ,UT, AK, OR, FL, CO.