Hi Eddie,
check out Australian Ebay http://listings.ebay.com.au/aw/plistings/list/category43476/index.html?from=R4

I've bought a few from there.
Panasonic SD Card
Sandisk SD Card
Note
The above 2 work with Kn7 PC SD Audio Writing Kit & Juke Box Software ( plus all the other kn7 SD files)

whereas another brand I bought PDC (sd card) works okay with the normal sd card files and the Panasonic SD CArd Reader/Writer , but it doesn't work with the Juke Box Software included in the Kit. Therefore I couldn't use it for Audio Files on the KN7, but was able to use it for styles, sequences etc


I usually stick to buying from the larger sellers rather than 1 of individuals, and I always check their Ebay ratings.

best wishes
Rikki