I apologize for your difficulty in finding the correct SWITCH lid for your Dell laptop. If this webpage has your laptop, then you have the Inspiron 15R (N5110). This laptop takes the 15R SWITCH lids from 2011. I see only pink and blue ones on Dell's site available for the 15R (N5110) at this time. The newest generation of Inspiron 15R laptops (5520) use a different design of SWITCH lid and cannot be used with your Inspiron laptop. These newer 15R lids will be denoted by the year 2012.
Best Buy sells them as well, if you do a search for "Dell SWITCH" you can see the ones for sale. Here is one that will fit your laptop:
Hope this helps!