For 1907 replica - highly recommend turner saddlery
The "biothane" read: rubber somesuch is a great sling for real heavy outdoor use and a little more forgiving than leather.
Traditional leather are real stiff choices if you need one like that.
All sorts of colors ... the dark brown AWS only looks OK IMO but that's what is on my Garand.
The Springfield one broke a keeper on me and that is how I found the above.
*Also available on Midway et al.
No I don't work for them! Just won't put any other sling on my rifles!