Yes, the Cebeci Arms Leather Executive Shoulder Holster is open ended and will accommodate a 5" Ruger GP100 Revolver.
I would recommend emailing us at Techsales@opticsplanet.com and letting us know what specific handgun you have, that way we can more easily find a holster that will fit your handgun.
Yes. You should be able to use the 3 inch Cebeci Arms Leather Executive Shoulder Holster.
https://www.opticsplanet.com/cebeci-arms-leather-executive-shoulder-holster-rev-20986.html?_iv_gun-make=taurus&_iv_gun-model=taurus-model-4510-judge-3in
The Cebeci Arms Leather Executive Shoulder Holster should be able to fit your Windicator as it is a K-Frame revolver. The right hand holsters position the handgun on the left side of your body. So the holsters that will work for you are MPN:20986RB08 (black/right hand) or MPN:20986RT08 (tan/right hand).
The only possible option that would work for the Governor would be one of the options labeled "Gun Model: Taurus 4510 The Judge 3in".
Any of the models for a S&W J-Frame 2" would be a good holster for the S&W 642-2.