Absolutely!!! There were many rifle makers from that era besides Hawken, and Henry. There was, Le Conte, J.V. Bouis, Migneron, Lakenam, Huber & Hoffman, Roper, Altinger, Jackson, Labeau, and all of these besides Henry, were at one time in business in St. Louis from as far back as 1804 to 1840, and beyond. The list would have to be huge if one added all the gunsmiths from the east. Some gunmakers from the east besides Henry who's rifles ended up out west during this time were; Tryon, Deringer, Goetz, Fordney, Gill, Leman, Gumpf, Bender, Gonter, Miles, Ghriskey, Crabb, the list just goes on! If I had a week to set down at the Fur Trade Museum's Library, 25 miles east of me I'm sure I could compile a list that would put us all in awe of how many there were. I just don't have the time right now. Maybe this coming winter???
To remark on your other comment in your reply, gordy,,, right now I think there is lattitude when it comes to buckskinning. Probably more so then in any other reenactment group. If you don't allow for this, how will you pass it on to the young ones... It's mighty expensive to outfit kids each year who are continually growing!!!
Also, I don't know how big each gunmaker was. I expect the one's who filled contracts for the fur companies must have been fairly big, like Henry, Tryon, and Deringer, to name a few.