How to pick PNP transistor for nixies

Go to digikey.com, search for PNP transistor, select Transistor (BJT) Single.
Filter on "Voltage - Collector Emitter Breakdown (Max)" and pick 200V, then look at the ones that meet your current requirements.

I think you will need another transistor in front of it to drive it, something like this, so the base voltage can swing high & low enough to control it.