The selecta disks(solid 240mm) and pads will fit. I think these were also fitted to the later 1100 pandas. They are, in the UK at least, very expensive. I'm not sure on the Y10 turbo, my eper says the same as the standard panda.
The best bet is to use 'standard' size uprated discs and pads from the likes of reddot, tarrox, etc. Also fit braided hoses and new (and posibly uprated) brake fluid. It should be changed every 2 years.
It is posible with custom brakets to fit Punto GT vented disks (259mm) with matching calipiers.
I have a set on my Panda and a how to post will be on its way soon.