Recommendations for a PCIe Parallel card available in the Uk?

I was going to suggest this instead:
eusurplus.com/index.php?route=product/pr...63_291&product_id=54

(Much more than just a parallel port)

But they are out of stock.

I bought a bunch of cards a while back to try to answer this question,
forum.linuxcnc.org/38-general-linuxcnc-q...sic-questions#102070

This one looks likely, if you don't want or need EPP.
www.amazon.co.uk/KALEA-INFORMATIQUE-Cont...ds=pcie+db25+moschip

Avoid any with the tine WCH chip, those need to load a driver to the cad at boot time. and don't work with LinuxCNC.

I have used several PCI card with MosChip (NetMos), never had problems with them, and they do work on different modes, In, Out or X.
See if you can find any PCIe with that chip, they should work with Linuxcnc.