Roast Duck La orange
La Vie, on San Gabriel Blvd. in Rosemead.
I went there for the first time the other night, and I can't believe it's taken me this long to visit this little gem of a restaurant. The menu is truly a "greatest hits" of classic bistro cuisine: we're talking duck in grand marnier (orange) sauce, poulet a l'estragon (chicken in tarragon), coq au vin, pork tenderloin, trout meuniere...you get the idea. Dinners come with a bowl of the house soup (I upgraded to onion soup gratinee) and a classic butterleaf lettuce salad. Just about everything is under $20 as well. Even had a nice bottle of some Cotes du Rhone for only $21. I can't wait to go back.
The place is located at 2547 San Gabriel Blvd, in Rosemead. It's a few blocks south of Garvey, if I recall correctly. It's EXACTLY what you're looking for.
Duck L'Orange is such an old standard that hardly anybody offers it anymore, certainly not a cutting edge chef; however, there is maybe just one in your requested area:
Stoney Point Restaurant - (West) Pasadena
To get a sense of this place read this blogger's pictured review: