Fitted the spacers from Suzuki to my L2 without too much problem. One thought, you don't want them too tight so that if you topple over, the mirrors might just swivel around and not smash, but if you're never going to fall off .....
I didn't think the Suzuki ones made that much difference, I've used similar ones to the ones Greywolf has on another bike and it seems to make more of a difference. Not sure about clearance on our L2, but maybe you could combine the Suzuki and Greywolf style ones?