Manually downloading Auxiliary Data Files for ERS-2 products

I am trying to remove the antennae pattern from an ERS-2 (.E2) product. When I try to perform the operation, an Exception occurs saying that the program can’t find certain auxiliary files (see screenshot below).

Where can I manually download the auxiliary files for this product? I have tried here but these files are not for the right date ranges as shown in the screenshot.

There is a file called in the etc folder of the snap installation directory. Within this text file, it lists the urls and remote paths to get the various metadata for each product including orbit files and antenna removal patterns and such like.