I just bought a Belkin CF Bluetooth card for a total of about $21 shipped from this Ebay auction/Seller. Their other auctions list more of these cards:
<http://cgi.ebay.com/BELKIN-Bluetooth-Wireless-PDA-POCKET-PC-CF-Adapter-PV_W0QQitemZ5870973063QQcategoryZ3728QQssPageNameZWDVWQQrdZ1QQcmdZViewItem>
http://cgi.ebay.com/BELKIN-Bluetooth-Wirel...1QQcmdZViewItem
There are apparently different versions of this card. This one being sold is the one that is compatible with Zaurii as per the OE BT compatibility list.