Sew your own: historically accurate pioneer clothing
How to Dress Like a Pioneer Blog lots of patterns & modifications of modern clothing
The Sewing Academy from Elizabeth Stewart Clark. One of the foremost resources for professional and amateur re-enactors of the 19th Century. Patterns & classes available!
Finished products or Tailor made:
Pioneer Trek Designs offers finished and tailor made 19th Century pioneer clothing for Men, Women, Boys, and Girls.
If you are aware of others please submit your suggestions in the comment section below