I'm thinking have a spreadsheet with one column for designation, one for application and function, and then one for each scale with all MFR's producing it in that scale listed.
Example:
[LAU-128] [AMRAAM/IR AAM launchers, late F-15 Stn's 2AB/8AB] [1/48: Wolfpack, Shull24] [...]
with each MFR's listing being a link to their page on the part or their catalog, where available.