Help needed from a fellow collector in the UK

[maccafan78]

Hello all.

This is my first post with my new username, but I have posted many successes (thanks to the help of all of you on this site) in the past.
I am looking for help from a fellow collector in the UK.
There are so many people I would love to write in England, but unfortunately I'm unable to find anywhere to purchase British stamps locally here in Canada (or online), and the cost of international reply coupons for even a simple letter are insane!
If anyone knows how I may go about purchasing British stamps online, or would be so kind as to take the time to send some to Canada, I would be so very grateful, and would be willing to pay for the help, and time.
As a huge fan of the book, and movie American Psycho, I'd love to write for a signed playbill from the upcoming London musical of the same name.
I'm also a huge fan of many British shows, movie, and musicians.
I would be more than willing to trade U.S. stamps, or Canadian stamps for anyone in need, and of course reimburse someone for their troubles.
Any help, or advice would be most welcome!

Thank you all for any information you may be wiling to send my way!

Cheers!