Regarding the eBay Cambio Corsa parts...
I wrote to the seller several times, pleading for detail pictures of the dropout teeth and axle, but her husband was out of town, the camera was at another location, she forgot but would send them the day the auction ended... I finally learned that the dropouts and axle were both worn and in poor condition, making them pretty much useless.
However, if you needed the shifter arm or the qr lever, this might have been the cheapest way to get them nowadays.
Aldo Ross