I have a used Mosley TA-33 in a box that's been in storage for almost 20 years. It'll be going up on a tower next year. I can't remember if it's the full sized TA-33 or the TA-33 junior model. Anyways, Mosley still sells replacement parts for their older products.
I'll be renting a manlift to do the tower work. The middle Tennessee amateur radio community is reeling from the recent death of a tower climber that was doing some tower work for an amateur radio operator that had recently moved into the area. Here's an article regarding the accident:
http://wirelessestimator.com/articles/2018/fund-set-up-for-mastec-construction-manager-who-died-in-weekend-tower-collapse/ I spoke with a number of hams from the area and they were all upset about the incident, and rightly so. It looks like manlift rentals are around $200 per day, certainly worth the money if it can avoid a fatal or even a non-fatal accident.
You can frequently find towers and antennas for the taking, if you're willing to take down the tower. I would be very hesitant to take down a tower, without a thorough tower inspection and a full background history of the tower.