Since they managed to acquire some more data points they can now estimate at least the axis towards the second landing spot, and the smart Flight Dynamics team should be able to calculate the landing area.
OTOH, ~200m (my calculation; 28cm/px, 730px distance) traveled from the landing site at 15:34 until 15:43 (= 9 minutes) is about 0.37m/s in horizontal direction. The second touchdown was at 17:25, 111 minutes = 6660 seconds later. That would be almost 2.5 kilometers of travel if it was flying over flat terrain. 67P is approximately 4.1 kilometres by 4.3 kilometres* so obviously the trajectory is curved, but that puts the second landing spot roughly half the comet away from the original one, probably somewhere in the middle "saddle" area - the area with deepest gorges and cliffs, most shade, most irregular terrain, and most hidden from all directions. And even if the flight dynamics lets us calculate that second spot, there were another 7 minutes of flight after the second bounce, and we have no clue about its direction (though hopefully the speed was low.)
Adding David's notes to that - Philae being hidden in deep shadow - 1.5 hours of sunlight a day means it's (partially) visible (possible to appear on photos) about 6% of the time. Since it's highly unlikely (...6% chance per photo) that any of prior photos of Chury caught that area when it was lit up by Sun, chance that the 'differential analysis' (like for the first landing spot) will be viable is proportionally diminished. even if we take the photo with Philae in sunlight - simply no photo with visible ground without Philae to compare to!
Probably the best approach to finding Philae would be by finding the moments when radio connectivity is cut off/re-established with Rosetta with it orbiting the comet at various angles, and modelling that data - Rosetta's radio "field of view" edges - onto the comet's 3D model, finding where the edges of "visibility" from moments of entering/exitting the "view" converge. But for that to happen, Philae must talk. As long as it's silent, it's seeking a needle in the haystack... at night.