Had a happy accident - tripped over my network cable and ripped the x-jack off my 3cxe589 pcmcia lan card. Having done this (and having no dongle) I decided to take the case off to have a good look at the gubbins.
It was easy enough to bend the pcmcia connector round 90 degrees without the risk of anything shorting, the tricky bit was soldering 4 cables onto the small solder headers.
Next removed some excess plastic from the amiga motherboard, to expose the pins of the pcmcia connector and plug in the 3-com.
I now have a lan card sticking out at 90 degrees to the motherboard. A 4-core wire connects the innards of the pc-card to the output of a standard pci lan card, which sits nicely in the pci slot of a micronik zorro board.
Recycled the broken pcmcia card, nad no need for a costly right-angled adapter. Plus frees up a slot in my mediator when I get it fixed.
All in all about 45 minutes work.
My £1.99 soldering iron died at the end of it though :-)
I'll post some pics when I can.