Hi,
The Ram is mentioned elsewhere (including the the ongoing 2016 wish list), together with the Sexton and the Kangaroo.
The Grizzly is the Montreal version of the M4A1, only 188 were built but they exist disproportionately in preservation due to their being sold to Portugal and surviving in service until the 'eighties.
http://the.shadock.free.fr/sherman_minutia/manufacturer/m4a1mlw/grizzly.htmlhttp://the.shadock.free.fr/Surviving_Grizzlys.pdfThe one at IWM Duxford is dressed up as a welded example:
http://ultravanillasmurf.blogspot.co.uk/2016/02/grizzling-m4a5-grizzly.htmlI think it has been sold.
I have pictures of the Southsea example, but I need to sort them before publishing, I also need to revise some of the text on the above page.
The difference between an original M4A1 and a current Grizzly does not represent the original differences, as Grizzlies received various upgrades and after being preserved many have been made into "M4A1".
It is possible that a future M4A1 kit might have the Canadian track and sprocket.