You found all of my recent Zelenka editions on IMSPL, so I only have to announce the following one:
Antonio Caldara: Missa Providentiae (including the Credo ZWV 31 by Zelenka)
(Note: Most of the lyrics are missing in the Credo, which is why I had to reconstruct them -- see the preface. This movement is stunning, especially the Amen fugue which prominently features the passus duriusculus - a fugue could not be more "Zelenkian" ).
How very exciting!! It's interesting that Zelenka did a number of inserted movements for various Masses by other composers, and I hope that they will get some recording attention at some point in the future. For example one by Pisani, which is the Benedictus ZWV40 - a nice short layered SATB piece with interlocking an string melody which is similar in principle to the Da Pacem Domine ZWV 167