Perhaps one of the acrylic versions of a "modern" kilt? I've also seen acrylic/wool blends with pockets as well. It might avoid the cotton issues. I've go no experience for that suggestion. My kilts are wool or cotton.
Acrylics are for the most part, inexpensive. The blend fabrics a bit pricier but still not wool pricing. Besides it's a reason for yet another kilt. You have, after all, downsized your closet after you downsized yourself.