A bit late to reply on this, but did you end up doing it yourself? I have found the Game Boy mods to be some of the easiest ones to do, and great for new folks to get into console repair and upgrading. I usually grab them when I see them cheap at yard/garage sales (in the US) and drop about $30 worth of parts in them. The local game shop in my town lets me sell them there for a decent buck, and he takes only a 10% cut since people typically buy a few of his games with one of my units.