Campagnolo Chainring Nut/Bolt Tool?

[djdj]

Does anyone make a chainring nut tool that fits the chainring two-piece nuts/bolts, circa 2010? Not the torx bolts, but rather the nuts/bolts that have the slot that one needs to hold while torquing the torx bolts. The Park tool I see online (CNW-2) does not look like it is designed to fit, and using a screwdriver seems a bit dodgy.

These are the chainring nuts I'm talking about. Thanks in advance!