Warren,
There are at least two that I can remember that involve Chan's chauffeur, Birmingham Brown (Mataan Moreland):

The Shanghai Cobra

Docks of New Orleans

This is presuming that my memory is still functioning!

Virginia

Yet another one is THE SCARLET CLUE (takes place in a radio station)

Both SCARLET CLUE and SHANGHAI COBRA are on vhs/dvd as part of the Turner chanology collection. You can probably get them through netflix.