I have a spare dragon part if you want it? It is indeed from their Russian M4A2 76mm but it does look a little toy like as the folds are quite large. See below for a quick snap - if your interested pop me an email.
I just fitted a Tamiya M51 cover onto the turret from the Tamiya M1 to build a HVSS IDF M1 sherman. It worked well with some filling and sanding - I thought it would have matched up perfectly but after two attempts I realised I'd have to do some fudging around the mantlet. I added bulges at the sides to match up with the lift rings on the mantlet and it looks the part - though I still want to tweak it a little. If you can get hold of one it's worth a go.