They do have this deck:
http://www.cards4magic.co.uk/acatalog/x ... _Size.html[[[scroll down to where it says "Flash Cards Memorised Deck by Kerry Summers".]]]
A picture on each card. I get the impression they may have playing card symbols on too though. It's hard to tell from the description and there's no clear illustrations.
I don't want the spectator to think of this as a "card trick", so if there's suits and numbers, even if disguised as other things, it might feel like a card trick.
Hmm... they may work though. Does anyone have this deck?
Otherwise... can anyone suggest an alternative?