Thanks for the reply! Good to hear that you've 
had some luck with something similar :)

That makes a lot of sense. I've bumped into a 
couple of sellers who seemed quite friendly and 
helpful in this regard but in the meantime I'm 
keeping my eyes on eBay and Yahoo Japan and 
scouring all the seller sites I can find with 
reasonable regularity. I'm sure I'll build the 
contacts as I go!