I think Shelley Posen does his bit in Ottawa. We also have his book and have a local music store selling copies of it.
The Book is:-
The Canadian Pub Caroler
ISMM # m-706023-00-7
Published by OFC Publications. A Division of The Ottawa Folklore Centre Ltd.
1111 Bank Street
Ottawa Ontario
Canada
K1S 3X4
e-mail: thefolks@ottawafolklore.com
website

Probably easier for the UK readers is:

The Joy of Christmas (The Blue Book)
ISBN: 0-9543334-0-3
Pub by Worrall Male Voice Choir Reg Charity Number 515038
317a Haggerstones Road
Worrall
Sheffield
S35 0PB
United Kingdom

e-mail secretary@worrallmvc.org.uk
(last year my contact was Keith Hoyland who was excellent to deal with)
They also have a website.

The CPC has 27 songs, arranged in mostly 4 part with a couple of 3 part harmony and one round. Some are credited to the JoC. It is about 25$Can, although if you buy lots you get a deal. I think we paid about 20$Can we have friend with relatived in Ottawa so zero postage.

The JoC has 90 songs, I think they are all in 4 part. It has at least 15 versions of "While Shepherds" last years cost was 5 Pounds UK.
That is about 12.50 $Can then you add the postage. It is a pretty big book and postage will probably at least double that price.
There is some duplication book to book, although the CPC has some not in the JoC and Viccy Versy.

Good Singing to ALL, JohnB who hopes he got all the above info typed in correctly.