My 1st choice would be a Borg 125mm f/6.4 ED objective lens and cell assy, but I would also be very happy with ANY undamaged good quality 4-3/4" to 5-1/4" APO objective doublet or triplet lens cell assy. I have a Borg tube baffled for 125mm f/6.4 objective with AP 2.7" focuser and case with no functional objective at this time. While I only need the objective, I would gladly buy a complete optical tube assy that has been damaged as long as the objective is in good condition and between 120mm-130mm at f/6 - f/6.8. If you have a similar lens cell that you would like to sell, please let me know. I will pay top dollar for a good match. Many thanks!