Marciovp, RWA,
thank you. The short answer to my question appears to be: no, no one here has proof.
Proof would be, say, an SB number and date with the mod. Note that I have SB A320-31-1267 Revision 2, which talks about H2F3. It is not in that release.
I have asked a number of correspondents at airlines with large numbers of A320s in their fleet. No one has seen an SB with this mod in it.
I am quite sure there will be one. I am almost equally sure by now that there isn't one yet.
PBL