Graham,

Not yet, and when they do come up they go for nearly new prices, especially the HS APO 200, however I continue to hope. I have got the 300 f/4 HS APO and it is stunning on both my 7D(450mm equivalent) and on the Dynax 7, TBH I don't think that any of Minoltas Pro (White or Black) G lenses will be bad all, the ones I have are (to me any way) exceptional. So if you have one or are expecting to get your hands on a 200 f/2.8 I do not think you will be disappointed.
I do believe that the 200 f/4 Macro is considered to be a better lens, but again even more expensive.
BTW if you have a cheap/reasonable source for 200 f/2.8's I'd be awfully pleased if you'd share the details with me