Just picked up my Ruger Alaskan 454 (2in barrel). Anybody know of a good chest holster for this gun? All I can seem to find are made for 4" barrels. Would these 4" chest holsters work well for the 2" Alaskan? An associate at SW said the 4" chest holsters work fine, but, I'd like to know if any of you have any ideas/recommendations for a chest holster for this model?