...and the winner for the hardest tool to find when using basically any internet search engine...USE
I've been looking for this thing for over a year!
You can use USE here: https://www.proteomicsdb.org/use
You can get the code to use USE locally here! https://github.com/kusterlab/universal_spectrum_explorer
Think it looks like the amazing IPSA that you're already USEing? It ought to, it is an expansion on that great resource!