Kits:Resicast are refreshing theirs, Resicast are accurate, very well researched, & expensive!
S-model did one, I got mine cheap on $b@y!
I haven't started it, as I don't have enough refs to do the interior.
Comparing the 25pdr (88mm eqv) RESIN barrel to Tamiya's plastic 25 pdr, it's a very erm... anemic copy.
My Chassis tub is in several bits, I'm not sure about the transmission cover shape, though there are 2 marks of Sexton & Grizzly that different in detail. Finally, the 100's of so-so track & suspension parts put me off.
Books: Wydawnictwo Militaria Tank 6 Canadian armour in detail: Ram, Sexton & Grizzly in detail.
Mags: the UK Military Modelling mag did a d-day build article, will try to findthe mag.
There was a WIP on the website, here: http://www.militarymodelling.com/forums/postings.asp?th=27561
Rumours: a 'major mfr' is allegedly toolingfor plastic, the name escapes me...
Edit: google the excelent Canadian Armour website!