Didnt see where else to post this this . But im wanting to buy a vintage leather sling its 100 years old atleast made by martini henry . imausa has them . so im wondering if a 100+ old leather sling will still be useful ? I know i could just go buy another new one but it not the same and somthing with history . i was looking for a 1907 sling original or one from ww1 with no such luck . also who makes 1 1/2" swivels i can only find 1.25". i think a restored leather sling from ww1 or old era would add some sort of nostagia to a rifle

The first place that I'd think of is Dixie Gun Works, they used to have a ton of stuff like this.

http://www.dixiegunworks.com/default.php

I'd suggest giving them a call and talking to someone, if they can't help you most likely they can steer you to someone.