I know your pain- I'm in the middle of my research project at the moment!

The way I came up with my question was to basically read a lot of research on my area and look for the gaps in the research, usually if you just read the limitations of a study you can come up with endless possibilities! It sounds like you have an idea of the broad question, just needs refining.

Have you looked on the net for "forming a research question"? try one of the search engines- there is tons of stuff on writing research projects, that might be worth a try. Don't forget your question may change as you develop the project, my last dissertation question/title (for my undergraduate degree) changed up until I handed the thing in!