You will be surprised to see that network cards have gone down in price a lot in comparison back with what they cost back in 1997, 230 euro (Ariadne 1) versus about 100 euro for a new one now or about 50 euro for second hand Amiga NIC if you look in the right places!
You can probably find a set on the net if you search a bit, but I suggest making some connections and perhaps someone can help you out.
