Has anyone got experience with Agfa APX 100 glass plates?

Available, for example, at MacoDirect:
https://www.macodirect.de/en/raritie...-03/2020?c=618

The format is 65x90 mm, which I have never seen before. Is that the same as 2 1/2 x 3 1/2 inch?

Are there any suitable holders for these plates that can be used in a standard 4x5" view-camera?

(I am aware of the J. Lane Dry Plates, but would like something more light sensitive)