This seems to be a pretty glaring issue, not enough gear out there to fit the wide variety of female shapes out there. I had a thought:
Aramid (kevlar) material is pretty inexpensive and can be bought by the bolt onEbay. Why not get some of that, some nice soft comfy material to go between it and your gams, take it all to a seamstress along with a pair of Jean's that fit you well but maybe a bit loosely, and have a pair of custom riding jeans made? I'm sure you could also bring impact armor and some velcro and have her make pockets for them that ACTUALLY keep them on your knees, which is a problem with mens jeans as well.
You could also sew this up yourself, if you have room for a sewing machine next to the stove.