Would either of these fit a Security Six/Blackhawk?

I'd like a holster like this, but I won't get to use it that much, so I'd prefer it be a reasonable price.

http://www.sportsmansguide.com/net/cb/classic-old-west-styles-vertical-shoulder-holster.aspx?a=606329

http://www.sportsmansguide.com/net/cb/standard-us-military-issue-shoulder-holster.aspx?a=453872

A holster made for a 4" K frame Smith should work fine for a 4" Security Six as they are very similar in size. Neither will work for a Blackhawk single action.

I'm more worried about the Security Six, I spose.

Have both Security Six and Model 19 S&W ..... Several Holsters are shared between the 2 of them ..... No noticeable difference .....

Think those would fit the SS?