The problem with the analog Sony cameras is that they are plagued with bad capacitors, and they do not have a line TBC. I've read they already started to fail at 10-15 years after the manufacture date, so the odds of finding a fully working one are frankly low. The youtube user 12voltvids has several videos where he replaces some capacitors in these models, and even then only some cameras work again. Then, depending on the capture card and tapes conditions, you would need to add some form of line TBC in the middle, such as the Panasonic DMR-ES10 or ES15, which also introduces its own defects, mainly overblowing the highlights. As you see there are several tradeoffs with these older cameras, if you want a more in-depth discussion about the differences in playback between the older and newer camera generations see the following link (
https://forum.videohelp.com/threads/...e-color-issues).
Answering to your question, if you're happy with the picture quality your current camera delivers except for these bars, perhaps you could try to find some Avisynth filter or a combination of them that can get rid of these horizontal bars before trying to find a working older camera.
