Is that that sharp areete? It was overgrown on its RHS, but that looked like it would give a good problem too. And there is a block about 20m towards the car park from there, an off-vertical wall with an arch that looked like it would have about 3 problems on it. And check the Chatsworth guide for the last 2 routes, John Allen E2s. These are on the Hueco Wall, 70m past the end of the main area of routes, a lovely overhanging wall. As well as the 2 routes is a tricky trav, and the left arete is a good 5b.
But as to any info on these, I'd say the Bish is your man.