The easiest way to get large amounts of CTC money would be to ask a collector of CTC money, they always have some on hand. If you want to start a collection, often their stash of coupons, that they use for traders at the stores, has some great notes in them for a novice collector.
I have seen several auctions by the Toronto Police department on eBay also. The suggestion made by Skylark is also a good possibility to get some. But most managers are not collector friendly, they have a store to run. You would probably have more success with the owner.
If all else fails, send me a PM I might be able to help you further!