Using WorldCat is often the fastest way to find music scores and recordings, especially when the items you seek are obscure.
WorldCat lists library holdings nationwide. You can get an overview of the entire musical landscape (in all formats) in one search. You'll discover, in one search, what items are held in Tiger, Prospector, and other libraries.
You should allow 5-10 business days to get items from WorldCat (Interlibrary Loan).
Check out this search: l'homme arme and notice the comprehensive results!
When the materials you want are not available in the catalog or Prospector, you can search in WorldCat and request them through Interlibrary Loan.