Marketplace
PDIGD20
Decent price for the V1 Canon version inc postage on eBays latest deal. Stock is local (NSW) so delivery timeframe is reasonable.
Yes, some places have it online slightly cheaper (TecoBuy/TobyDeals) but they don't have the best customer service track record. At least with eBay you have some back up.
Enjoy :)
Finally, a flash for my round camera sensor.