Hi John, In all my travels, the ONE and ONLY current source for electric antenna repairs that I have been able to find is : Klaus Wojak, 241 Hanging Rock, Banner Elk, N.C. 28604, (828) 898-9338, 1-6PM. I don't think Klaus sells parts. Rather, you send him your antenna, he looks at it, calls you up and quotes you a price for complete R&R and making and installing a new mast. The price is quite steep ( about $400 +/- ) . But the work is splendid. Last 300F power antenna mast I saw on eBay went for over $200 bucks. That was 2 years ago. I know Terry McTaggart recently had Klaus Wojak redo his "F" antenna. at that time, Klaus told him he's thinking of retiring from rebuilding antennas. I have been trying to reach him for weeks with no success, he might have gone South for the winter. Klaus also redid an "F" antenna for me, and, again, it's just splendid. The mast he made is correct in every detail. The thing goes up and down as it should . Hope this helps. If you, or someone else on this list, finds another source for either rebuilding, or parts, for POWER antennas, please let me know . Dennie Turner won't touch power antennas. 300'ly John