Having just built my own rack cloned off the L200 design, I can say that unless you have a near-pro wood shop, and access to good supplies of wood(s), it'd be a tough slog, just for the cabinetry.
And, those hoary old 4350/55s are not state of the art soundwise by any means.
I spent most of my 20s in the presence of a pair of them, and much time comparing them to my 3-way L200s and showroom L300s.
I have no way to compare them today, but I think my now-4367 woofered 3-way L200s would give them a real run for the money.
Louder? Yes. More impact? Yes. Cleaner/better sound? No.
So that pretty much leaves visual impact/aesthetics and Plays Really Loud - for really big vintage tech I think that would be a very small market, plus the whole 'not-original' issue mentioned above.
DIY M2s or even 4367s would be less expensive to build and sound better.
They sure are pretty though, and was just talking yesterday with a friend about them - for the right price I'd take a pair for rear surround use any day!
(The one on the right is the rack)