Here's the website
I use the metal 4x5. I like it for a small viewcamera. It is a bit of a puzzle to open and square up, but it is solid and easy to use. Make sure you can adapt your lensboards to the camera (if you already have pre-existing lensboards). For 5x7 I use a Deardorff, but if I were starting over would probably buy the wood Canham.
They don't seem to reply to email, at least my one try. I've heard that phone service is okay, but no personal experience.