The only chord that I know of that has a flatted 9th with no seventh is the major sus4 flat9 chord; for example Csus4b9.

See here: https://en.wikibooks.org/wiki/Music_Theory/Complete_List_of_Chord_Patterns


I think my wife has started to show the first signs of dementia.
She said she can't remember what she ever saw in me!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware