Micarta has been used for knife handles for about 100 years. (I've never been able to find the first Micarta knife handles, but it was about 90-100 years ago.) So it has been accepted as fit and proper for traditional knives. In fact, 2013's traditional forum knife had ivory Micarta handle covers. So we might want to go for something different like red linen or natural canvas Micarta. Or maybe someone has a nice big stash of the coveted Westinghouse Micarta!
The first Micarta-like stuff was produced in the 19th century, but it was Westinghouse that began the large scale production in the early 20th century. They were looking for uses for the material, and knife handles were just one area where it was marketed.