...
- http://hollywoodposterframes.com/ - pre-built frames,
- http://www.spotlightdisplays.com/ - Flip frames (not sure what that means),
- www.displays2go.ca - search for snap frames (also has lightbox models) - not sure if archival though
Putting it Together,
- Back the linen poster with acid free material
- Acid free foam core or 4 ply rag are best
- Hinge mount using some archival tap stuck to the linen
- Do not stretch
- Trim the linen about 1/8 smaller than the inside dimension of the frame
Links,
- Canadian in Port Perry for Linen Backing - http://www.backingtothefuture.com/services/
- Good Forum Discussions - http://www.allposterforum.com/index.php/board,59.0.html
- Alternative to eBay to buy Posters - http://www.mpb.auction/
- Video of how Linen Backing and Restoration Works - http://www.posterfix.com/
...