Hi Rat,
It's an inteesting idea and we thought about it for a while.
In terms of "time & money", it would have to displace something else that's "in-the-works". We're a small company (44 total crew) with both staff and financial limitations. Eric and I are creating most of the products, and we even have to work with collaboration designs as they are rarely ready to go as we get them.
We make 600-1,000 Mule team pieces 4 times per year (assuming it continues). There are so many different materials and colors that can be used for scales that I'm sure one color in one handle material would not please all.
A mold for an FRN scale would run $20K just for the mold. It would still have to be designed, engineered, many made and held in inventory.
We had hoped that someone would make scales and sheaths available as an aftermarket product. Deacon mentioned STR & Tricod. I know that Scott Gere (scgere@AOL.com) makes scales and sheaths for them. I'm sure there are others.
The project is already complicated because of the different materials and small quantities produced. Just when we start to learn how to work with a particular steel, we're done with that one and have to begin another learning curve on a new material.
sal