RayW, if your LS switched fizzled, chances are the contacts are just fouled and can be cleaned. Instructions should still be on Arc's web site and arrangements are being made to host them elsewhere permanently after Arc's site shuts down.

The switch is a normal Kroll clickie and you can also buy replacements at
http://www.anlighten.com/shop/product_info.php?cPath=48_55&products_id=65