I fumbled my packed-up houdini at the P3 belay ledge of Lotta Balls. It dropped ~75 feet from the ledge into the cracks below. It looks like it might be reachable but we we're out of daylight to go back for it. Once you surmount the bulge on P3 and enter the easier terrain it'll be in the crack somewhere.
The jacket is red and packed into a little bundle. If you happen to find it I'd be grateful to get it back.