I think will be very difficult to have a straight arm on a 1200...nowadays the shape, and all the detail that made the 1200 THE turntables in the years it's more a symbol than anything else...furthermore they still sells tt even if the technology behind it's stucked to some years ago. There are better decks on the market, on many side, but the 1200 is still the 1200, rock solid, reliable and a symbol for more than a generation. Until the 1200 will stay on the market I think that the changes they will made to it will be very very slight....IMHO
anyway I own 2x pdx2000 (1 mk I and 1 mk II)
the deck should be the pdx8000 but if well setted and weighted every Vestax deck can be scrathed almost at 90 degrees, personally tried

it's because of the tonearm system