Hey that sounds really cool. Can you recommend some for me?
Well in reality they use multiple subs for the higher lfe. And use only one for the low lfe.
It allows you to use cheaper smaller subs for the 2 to 3 little subs and only have 1 monster for the lfe.
Of course a pair of JL Audio 8w7-3s are small and comparable to many larger subs so if one knows the right drive this approach is unecessary.
But in practice you could pair an Ultra with 2 or 3 PSB-10s and get a similar result. You would want to use the ultra's sub crossover at 50 hz or lower.
This is a commercial solution however a Dayton 12 pair with 2 Dayton 8" might be a nice budget solution for this idea. Even pair of TSCs and a Dayton 12" might do the trick.