Ink Cartridge wanted for a Cannon S100SP

I have been gifted a second hand Cannon S100SP. The tri-colour cartridge is brand new, but there is no black cartridge in it at all.
I looked in Big C but they do not have one.
Anyone any ideas of a good place specialising in new cartridges?

There are two computer shops you might want to try just off the Phosi road at co-ordinate R15 on the Udon Map.

Walk towards the Big C on the Chinese Temple side and with Dalat Nongua across the road until you get to the big crossroads with traffic lights.

Turn left at the crossroads up Soi Nongbua as though you were walking towards Nongbua Park and you should see a computer shop on the LHS. About 100 metres further up is another with a guy that runs a little outlet.

The caveat is that I was last in UTH in November 07. So that's the age of my info.

Failing that, I'll post you one from UK side.

I've also seen places selling cartridges in the Complex on the 3rd floor (I think).

Thanks Westerby I will try Phosi road early next week....

Bob,
Have you tried any online printer ink supply companies, and ask if they ship to Thailand.

Wester's offer sounds good, he can send from the UK.

I never buy my printer ink on the High Street, most shops charge double what you pay online.

I have seen guys in Robinsons mall sell ink, but have reservations about using it for photo's as the dyes might fade over time.
My best results, for photography are with HP Vivera inks.