I was wondering if anyone knows if any M4 sherman's captured by the germans were ever upgunned with the 88mm or 75mm guns from destroyed Panthers and Tigers? If not were any ever converted into some kind of "Jadgsherman" using the same guns so they would look similar to the Marder or the Jadgpanther? I was thinking it might make a good "What if"

Any info would be greatly appreciated
Many thanks
Matt