So... does anybody know what options, if any, t/Space has left
available to it?

Well, I never took t/Space's main business to be the CEV. Maybe I'm
just not creative enough in my thinking, but I have trouble seeing the
whole system panning out - with a new/modified carrier aircraft (which
is likely to constrain the size of the CXV, as with other air launch
schemes), air launch with a crewed capsule (which I guess is actually
safer than ground launch, so maybe I'm wrong to see it as strange),
transferring in orbit (how?) from the CXV to the CEV (and the CEV gets
to orbit how?), etc.

(For the background see the CXV pages at
http://www.transformspace.com/index.cfm
).

The coolest thing they have done so far? Flying hardware for what was
supposed to be funding only sufficient for a study contract (see 14
Jun news on their web site about the drop test).