You might find them at "The Source"
http://www.thesource.ca/estore/Prod...&category=Specialty+Batteries&product=2300026
I think this is the equivalent battery to what you're looking for, but $19.99 is pretty steep.
Here's a Canadian online retailer:
http://www.canadaram.com/batteries.htm
They have them for $11.00.
I have ordered Pram gatteries for an old G4 PowerMac from Other World Computing (
http://www.macsales.com) in the past, as they were hard to find locally (at a reasonable price) here in Canada.
Here's the diect link, they're currently $3.99 :
http://eshop.macsales.com/item/NewerTech/BAA36VPRAM/
Even with shipping, these might work out cheaper than a "local" source.