Replace rectangular socks

[pdt7361]

I have an Eshopps ADV-200 sump that uses the 7 inch rectangular socks. I can only find them in 200 or 300 micron but would really like to use 100 micron.
Does anyone have any experience with these types of socks and know where to get some 100? Or possibly some way to change over to a different shape that is 100 micron?

 

[Schplitter]

I could make you a tray that can fit over the old section for whatever sock you want to use. I would need the new socks you want to use and some measurements from the sump.