I've been using the Kingston KNE-PC2T card with my A1200 for a while and it works fine with cnet.device. They go for around $10 on eBay. IIRC, I paid $12 for a brand new one shipped.
I've also used a SohoWare model I picked up a few years back. It's identical to the Kingston except it has a different label. (Sorry, no model number handy).
