Billy, is it really gone, or are you just suppressing it?
Did you finish the last kit you were working on, or did you stop at some point in the process of building a kit?
Is it that you are not motivated, or is it that you are procrastinating?
I had a similar experience recently, but really I think that it was more stubbornness, and procrastination (for lack of a more descriptive term) then a TRUE lack of inspiration.