Can this be used on any other brand of spurs other than edelrid?

This bolt spacing is similar to other manufacturers. I know its the spacing as Distel and Gecko spurs.

The biggest conflict that might arise is the flatness and angle of the shank itself. If needs to be perfectly flat. You also might need longer bolts to propery hold the spurs as you effectively have a spacer in there.

So in summary the hole spacing is the same but show it sits on the shank itself might be different.