Hello Scott:
I think if there are any, most likely that is not going to be so good, since in the T4 includes now the S.A.2 sounds among the Mega,etc....more mega voices, the new drum kits that there is nothing like it in previous models, etc.
Substituting this voices is not going to make to usable the style, it will loose "character", "spice", they may be perhaps just Partially usable.
Before I got my T4, I had the T3, and I had some T4 Styles I did edited some for the T3, and at best, just partially usable, that said, I can not imaging how would sound those styles on the T2 that has even less of the "newer" tone generation than the T3.
Or even if using a conversion software like Style Works Universal, that the template has not been updated for the Tyros 3 or Tyros 4.....I do not think will be to "workable".
Best of luck.
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mdorantes