Aside from Whitewater, many of the 90s games have replacement parts available — or creative substitutes that are darn close. And why is that wrong in today’s mod world? As an example, I built a brand new fish tales topper for roughly $300. And over 1/3 of the cost was the acrylic dome.
https://pinside.com/pinball/forum/topic/guide-build-fish-tales-topper-from-scratch
On the other hand, I’ve got a Gottlieb bone busters and so many of the parts of the talking skull topper are just not available nor are easy alternative parts available. If that game was popular, the topper would be commanding prices similar to modern day stern toppers...