Sig 556 Classic Single Point Sling

[lmcwig1]

I'm looking for a single point sling adapter for my SIG 556 Classic side folder rifle. Everything I have come across says not for use on a Classic or Classic Swat. Anyone know of such an adapter that will work or alterations that could be made to accept one. I don't want to change the stock as I do like it except for the lack of single point sling option.