The T&Cs on the FrameBook site say that the supplier is Mainline, although that's not much help if the framer isn't familiar with FrameBook printouts.
If you would like to purchase mouldings from this library please add your favourite products to a project and then print it off ... Take it along to your local framer and they'll do the rest!
What the customer is blissfully unware of is that there's a £50 minimum order with Mainline and a £9.95 carriage charge. So unless the framer is already dealing with Mainline, it's not going to be as easy as they make it sound.