Here's the series I used to use way back when:

http://hpmuseum.net/display_item.php?hw=1123

And this: https://archive.org/details/FEwinxl

I found a few other models online - new and used. Years ago you used to be able to lease these per week, month, whatever from test equipment suppliers. As cheap as the 495x series are on the used market I'd go that route - unless you find a ParaScope cheap.