I don’t think they currently offer something with a fleece backer. The mountain or timberline with a base layer would probably get you the same result. You can still buy the 90% pants if you look for them.
Check out the kuiu guide pants. I don't own a pair but have heard they are similar. I love my 90% pants and jacket. Not sure why they stopped making them. Desk jockey is right... you can still find them on the internets.