I don't believe that there is. In fact, I can't even think of anything that's close. I just purchased an STTNG and am just having a blast with it. Here's a game that is spoken in the same breath as TZ, TAF, IJ, and (maybe) WH20. These games are probably the big 5 of early 90's W/B DMD and all top 20 all-time games.
You can get a nice example of STTNG for under 4K. It's really unbelievable based on how much nice examples of the other aforementioned titles are fetching these days. I love WH2O, but as far as play and features go, it pales in comparison to STTNG. The only thing it has over STTNG is charm. It is definitely oozing with that. TZ, TAF, and IJ are $1500-$3000 more.
STTNG is so feature-packed, it's beyond belief when you've been spending a lot of time playing Sterns on location recently. The bright lights and newness can really cloud your vision. Those games are so "nothing" compared to a game like STTNG. And the only Sterns you can get sub 4K are the ones that you probably don't really want anyway. The combination of flow, modes, diverters, ramps, toys, and just all around "things to do" is really unparalleled, in my opinion.
Obviously, the market has spoken and there is a reason why STTNG is so "cheap". Obviously, cheap being a relative term. But it can't just be the numbers. There were twice or 3 times as many TZ's and TAF's and about the same number of IJ's.
Anyway, feel free to chime in with agreement or disagreement and explanation. It's always interesting to read the perspective of others.