I fitted SA pads to my Evo, Ron, and am very happy with them. Have a look here for my, and Flip's, experiences with them.
http://www.ukmonster.co.uk/monster/s...3&postcount=87
I got two pairs for £54 in 2017 from Simon at WSC Performance.
http://www.ukmonster.co.uk/monster/s...ad.php?t=56141