It is up to the OPL curating team to process Brock's files through the Contrib folder, and I think a stumbling block is that the OPL tagging system may not have appropriate tags for physics problems. And also the curators are not adequately funded (or not funded at all?)
You could set up access to the Contrib folder and just use the problems there, untagged, but sorted by their subfolders. This section has the details of you may do that: https://webwork.maa.org/wiki/Open_Problem_Library#Browsing_the_OPL