[Boatanchors] what is a tubular capacitor these days

[Brian]

As a learning exercise, I am looking to restore an old Heath VTVM here.. since there is a video on it. Anyhow, one of the things in it that is NOT labelled as an eletrolytic capacitor per se (there is one part that is an electrolytic).. is a cap named in the parts list as a Tubular capacitor .046 mfd at 1600 volts.
What is that these days. ... I see what appear to be a lot of old type caps that are tubular in shape.. I think they are mostly wax / paper kind of things.
Is this thing - "1600 Volt Metalized Polypropylene metalized polyprop film" -  a correct and proper thing to use? I think they used to be called Sprague Orange Drops (maybe)  or is there some other common and available sub with a current nomenclature?

Thanks, Brian VE3VAW -