There was also a British design for launch atop a Blue Streak-derived
LV which I haven't added to my site yet. As I recall the justification
was given that it was strictly notional, to allow simplified
calculations (as was the case with the F-117 and radio waves). I had
some correspondence with Nonweiler waverider advocates to try to
discover if either this or the Russian VKS design of the same period
were in any way related to that concept (part of which involved sharp
actively-cooled leading edges) but could receive no final answer.

In relation to Von Braun's design for a long-glide RV with a
lower-temp thermal equilibrium, I couldn't tell if anyone had actually
done meaningful calculations on this approach since the 1950's. The
Dynasoar came closest. But my impression is that there has been little
investigation of alternative re-entry strategies for a long-time (e.g.
Avco's mesh-drag-brake scheme, sharp or pointed leading edge designs
(NASA did some work on this recently taking into account new
materials, skipping or long-glide re-entries). Hopefully (but not
likely) some of this would be investigated in relation to OSP in order
to define a more fault-tolerant, forgiving re-entry mode for future
manned spacecraft in the wake of STS-107...