How the heck do I convert the rear end on my KingFisher (2005, KF1) to take the 12mm thru-axle?!? So, it's the Bontrager Big Earl wheels (sick wheels BTW)

What the heck parts do I need?!?!

Sorry, my LBS that sold me the bike has no clue.. Good shop but not freeride oriented!

Anyone else done this?!?! Is it worth it for the stiffness?!