I, too, have been waiting for these adapters to become much cheaper, but it just hasn't really happened. (about $30 in 3 months).
Here is one of them for you.
http://www.amazon.co.uk/Duel-Systems-DuelAdapter-PCMCIA-ExpressCard/dp/B000X45CG0
I too, have an Orinoco Gold PCMCIA card, which I bought just a month before my new Rock Xtreme 770, and alas, I have not used it since. The external antennas just cannot be beaten, and whilst I was in Turin on holiday recently, I had to have the dam laptop on the hotel window, which would never have been the case had I the ability to use my Orinoco.
Peace out....
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