Have a router? Then in this tutorial, you will be shown have with it, you can make a template to make it easier to make Mule handle scales... http://spyderco.com/forums/showthread.php?t=40768
And a little birdie told me that if you want, Hector Castro the guy that wrote the router tutorial above, will make you a set of book-matched wood scales for a really reasonable price, though you will need to epoxy them on, and finish them to your liking, but that is really pretty easy. And just made easier, by Hector himself, who posted another Tutorial on how to finish the scales.... http://spyderco.com/forums/showthread.php?t=40984
Quickbeam did a Tutorial on installing a set of permanent handle scales. You can see it here.... http://www.britishblades.com/forums/showthread.php?t=61292, which is duplicated at the Spyderco.com Forums... http://www.spyderco.com/forums/showthread.php?t=35469
It might be worth your time to read both, as the comments after each differ.
richroemer offered some advice on mounting your Mule scales, and some good discussion followed, with some images... http://spyderco.com/forums/showthread.php?t=40418
Here are some videos showing how to make simple leather handles for the Mule Team knives. http://www.bladeforums.com/forums/showthread.php?t=661104, http://www.bladeforums.com/forums/showthread.php?t=661105, http://www.bladeforums.com/forums/showthread.php?t=632164
Here is a tutorial by erix, and his Mule Handles have a unique car inspired shape... http://spyderco.com/forums/showthread.php?t=37975
And the finished piece... http://spyderco.com/forums/showthread.php?t=38038
Ian Atkinson of Britain, has a fine little tutorial on how to make sheath for a Mule Team knife... http://www.ianatkinson.net/leather/mule.htm
Here is a tutorial on how to make your own leather sheath, not Mule related, but quite good.... http://www.britishblades.com/forums/showthread.php?t=58874
Marion