Where can I find side sling mount

[TheDutchman]

I have a Mossberg 500a and want to mount a side sling mount type clamp on the barrel and tube, but can not seem to find one. Can the fellow THR help in my search please

 

[Brer Bear]

Check out http://thewilderness.com

They offer a Giles sling for the 500/590 with a front attachment plate.