Overhere, as one of the tools we had available was a little high speed mini drill. That you could attack a circular saw / cutter bit to...that would possibly cut bakelite, very nicely if you were Not ,in a hurry to cut it . Milwaukee made a battery powered one for sale ,also
I have one but it would have taken ages... I didn't have much time to pack things... Dad had the sheet in his shed for years, so it was either save it and make I fit in the containers or chuck it.