I have quite a bit of experience with this crank, having had one on my main road bike for 15 years. I'm now on my second one.
I'm fairly certain any dustcap from a crank compatible with the classic Campy puller will fit. (Some crank bolts have larger heads and may interfere with some caps, but this is easy to remedy.) The original caps that came with that crank are very similar to the Shimano DuraAce caps of the same period, if memory serves. But they are very thin--paper thin. And that can be a problem. You need to coat the threads with anti-seize grease, and break them loose every so often, because if they become stuck they will be impossible to get out--the aluminum is so thin it just tears. Obviously this happened to me. A machinist friend finally got them out for me but not without leaving marks around the opening.
Just a heads up.