looked pretty constructive to me - point being that it's unlikely to be a camber issue. It's far more likely wear in the lower arm bushes and / or incorrect tracking and / or tyre pressure
I have the 156 JTD 20V and it's pretty hard on front tyres. The inside edges wear out first. As did the inside edges on my old 145 QV. Both with correct tracking as well, although the 145 got about 15k out of a set of fronts, albeit with superflex lower arm bushes in, and it's more like 8k in the JTD. There is a bit of built-in negative camber in the suspension (that or it's sagging a bit!) and it makes it imperative that the tracking is spot on (or ever so slightly toed in from standard as i prefer it).
Toyo Proxes T1R (i have em on the front) seem pretty good though, but if you want a bit more tyre life with similar grip try Goodyear Excellence...very good indeed. HTH
PS good price on the Pirellis!