I'm needing a front derailleur and a seatpost to fit this frame. It's a late 80's bonded aluminum Trek 7000. The outside seat-tube diameter seems to measure just over 35mm, so I'm not exactly sure how that corresponds to front derailleur clamp size needed. As far as seatpost fit, a 27.2 I tried was too large, and a 26.4 was undersized. Absent the actual items needed, if somebody could advise on what size derailleur and seatpost I should be looking for, that would be helpful too. Thanks!