Grumble Grumble Grumble
ADV Films has the US/Region 1 license for 'Nuku Nuku Dash', and they just published a Thin Pack collection release for it this year...
ADVFilms: All Purpose Cultural Cat Girl Nuku Nuku Dash! Complete Collection
(Personally, I prefer the original 'All Purpose Cultural Cat Girl Nuku Nuku' OVA series, as I thought that they trivialized the story and relationships too much in the TV series...)