Ahh I see. Type 57 appears to be the 4x5 version of 667. For some reason I missed that on the website.
Question still remains about a 405 holder - I can't seem to find that sucker online anywhere. I guess I could bite the bullet on the 4x5 holder, but $60/20 exp compared to $20/20 exp for the pack film makes my cringe at this stage.