I found a couple of links on BGG about how people have used business card holders for Arkham Horror and Runewars ...
... and thought I would make some dividers for Talisman.
Whilst I was at it, I decided to go and buy one of the card holders and give it a try.
Though they work quite nicely, the Warlock Quest and Purchase decks would be too big for one tray if they were sleeved, plus they did not seem to sit right to me. It could be I am being a bit too picky, but there you go! As you can see they would fit sleeved cards if you wanted.
Still, for a fiver and a bit of printing, I think they aren't so bad!
If you want to give them a try, I have uploaded a pdf file which I will put on BGG also.