The Telefunken ELA M 260 Tri-Mono Recording Set is relatively inexpensive for what it is. Apparently it's designed to be a Decca Tree set.
It's under $5000 for three channels of microphones. Decca trees are cool and those Neumann M49's and M50's are stupidly expensive nowadays. Right now I have a fantasy about putting three of those Warm Audio U-47's in the air as a Decca tree.
Huh. The M50 is also small-diaphragm. I was not aware of that. Anyway, my last Decca tree was with a pair of new Neumann omnis on the sides and an AEA ribbon in the center. That worked out pretty well, especially with some large diaphragm tube mics as spot microphones.
Broken Peach's Pink Elephants on Parade is essentially a perfect work.