[edit] _Shimano_ brake pads on Campy 12 calipers?

[cgolvin]

[edited title and post to pose a different question]
I just realized that the Campy 12 calipers have a screw to secure the pads, similar to Shimano. Is it possible to use Shimano pads with these calipers? The SwissStop site lists Race Pro pads as compatible with Campy 10|11|12 speed, but when I asked their customer service they told me I needed "Flash Pro" pads, which they list as Shimano compatible.

Has anyone tried Shimano pads in Campy 12 calipers?

[FlashUNC]

Pads are a different width, won't fit in the holders.

You're going to be ordering new pads.

[cgolvin]

<expletive deleted>
Thanks.
Anyone have a source for Campy 12 pads? I can't find them for sale for the life of me.

(edited original post title and content to pose a different question)

[cgolvin]

bump since I changed the question I posed