Most definitely--get this tip to Equusearch and to the Twittys. Tim Miller said he will leave no stone unturned.
Looks like quite a few stones have to be turned over at these rental places, esp. if they show up as belonging to PVDS, Van der Straaten, or any of the cover-up people.
Get on the horn to Greta, too!
Email Letter sent to Texas Equusearch - I called both numbers but got no answer, not even an answering machine.
I will try again later.
If someone wishes to call or contact Greta please do so. All the info is here on the thread.
I don't know how to contact the family directly.