Were those uniform patterns in the Technical Manual good enough to make an actual costume from? I never owned one of the commercial uniforms, the closest I got was when my ex gave me a contemporary velour shirt for Christmas. It was very comfortable, but could get hot.
Well, most of the people in our club were also in the local Society for Creative Anachronism, so they were experienced costumers. I can't sew clothing to save my life (I can only do basic hand-sewing and I'm literally scared of sewing machines), but a couple of others were able to draft patterns and make the outfits. I don't remember what fabric we used, but it definitely wasn't velour.