Hanno,
While searching through Canadian War Diaries on a completely unrelated topic I stumbled across "Op INFATUATE - 4 SS Bde Outline Plan No. 3 - 18 Oct 44" which can be found at this link:
http://heritage.canadiana.ca/view/oo...69/488?r=0&s=5
Once you finish reading that document, you will get to "Op INFATUATE - 4 SS Bde Provisional Outline Plan No. 4 - 21 Oct 1944" at image 494.
These documents won't give you the level of detail about the Shermans that you are after but at image 489 there is a list of the Armoured units in support of the Operation. (also attached as an image)
I conducted a quick internet search for the 4 SS Bde War Diary but couldn't find anything.
I don't know the types of vehicles held by "27 Aslt Sqn RE", or "One Amphibious Aslt Regt RE/RAC" but I presume that the Shermans came from "'A' Sqn 1 Lothians"
My inclination would be to obtain a copy of the 1st Lothians War Diary as it may provide the level of detail that you desire.
Link to request the 1944 1st Lothians War Diary:
http://discovery.nationalarchives.go...ils/r/C4440967
Colin