I have a Prologix GPIB-Ethernet Controller which was bought a few years ago from Sparkfun, who still sell them:
https://www.sparkfun.com/products/8841It's still sealed in the plastic from the factory. Comes with a US plug power adapter, but I'm sure you already have a appropriate adaptor lying around!
Cost me 200 USD new. How about 100 AUD including postage inside Australia? Discount for pickup in Heidelberg.