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The film negative holder for this scanner comes in several sizes. 35 mm is one... which size do you need?
The slide holder is here:
(for the 35 mm size):
and the film negative holder seems to come in just one size (so I got that confused, and I apologize):
and for a rather more expensive alternative source for the film holder:
If any of these suppliers turns out not to ship to your region, or not have them in stock at the time, then call 1-800-OK-CANON and ask them for a replacement holder of whatever type (and/or size - again, I'm sorry I wasn't clear about that at first).
And if 35 mm is not the size of holder you are looking for, let me know, and I will look for the other size or sizes that you need.