Roger,
You make a valid case that this might not be someone's original kit, recently exhumed from a trunk or cupboard, but the amateur historian in me likes finding a "time capsule" from another era.
Perhaps I don't know where to look, or "what to look for", but most of the LTM stuff I seem to run-across is being offered a la carte...
Unfortunately for me, all the brick and mortar camera / photo stores in my region are long gone... so the Internet is about the only marketplace I run across this sort of stuff.
And, admittedly, I'm new to the Leica club, getting my first example in 2007.
I did get to handle some screw-mount Leicas on a high-school visit to the US Senate's photo-lab in the early 1980's... was quite taken with the strange German camera, and that odd lens with the funky hexagonal aperture ( must have been a Summar )... I was probably "hooked" then, but it took another 20+ years to be able to afford them...
Regards,
LF