Most of my handle replacements have been with the older HP equipment such as that found the 200CD oscillator which is a leather type. I have had good success taking a badly deteriorated handle to the local saddle shop who specializes in leather work. They fabricate handles that are exact duplicates of the HP ones and even stain them the right colors.
If you can find a person or company that does this kind of work a custom leather handle would look nice on the TM.
Greg