Not sure if you have noticed, but Ebay has a Bindery & Finishing Listings

over the last few months I've seen a pair of loop stitching heads sold on
there for £350

A Tri-score sold for £65 and a few other bits and bobs.

it's worth checking out, here's  the link

Ebay
Bindery and finishing listings

if the link does not work go to www.ebay.co.uk
then look under

business listings then click on the
print listing.