How much money do you have to spend?
And does it have to be the Canon S70, and is that
Canon or Canton?
There are hundreds of good speakers out there made by people who specialize in speakers. Canon make printers, cameras, and a variety of other stuff, I doubt that their speakers are the best engineered.
Again, if we can get a working budget, there are hundred of speakers to choose from.
I'm going to guess these are the speakers -
Canon S-70 - Hi-Fi Database - Satellite and Surround Speakers
These are somewhat obscure gimmick speakers, and I don't imagine you will have much luck finding them. Best set your sights on something else.
I would urge you to consider something like this -
These are amazingly clear and detailed speakers -
Q Acoustic 3020 Bookshelf - £120/pair -
Q Acoustics 3020 Speakers Per Pair
If you want to trim back the budget even more, then consider these older Warfedale Diamond 9.1 -
Wharfedale Diamond 9.1 Bookshelf - £95.00/pair -
Wharfedale Diamond 9.1 Speakers (Pair) - Superfi
Good luck, but I suspect this is a very rare speaker.
Steve/bluewizard