Ruger 357 4" holster recommendations

[wt]

I've got a Ruger SP101 357 mag with a four inch barrel I'm planning on taking with for archery elk. I don't know what holster would work well in that application. I will be attaching it to my pack. Any suggestions?

[jyerxa]

Galco are really nice holsters. But I did not see one made for a 4" barrel for that model.  They have them for 3" and 2 1/4" 

http://www.usgalco.com/Default.asp

[hillbilli]

company out of OK called Don Hume.. For concealed carry model 715m...