This Guy :
http://www.jpt-australia.com/maha/imedion.htm has the Imedions & charger & is reasonalby flexible with pricing
I have 3 sets of (4) aa's for my 2 flash units, so far so good
Apparently they can be still 85% capacity after 12 months, so good shelf life
the charger is a nice bit of work too!
Bryan