Damien-7,
Since the function of a control column or stick in WWII fighters was fairly basic and common, it's likely you'll find lots of very similar features associated with the shape of the stick and it's grip. The bottom of the stick, where it attaches to the control linkages, is likely to give more unique identification features since each aircraft had slightly different implementation of the control connections. Comparing that area on your stick with the pics of the P-40, I'd suggest they aren't the same since the P-40 has a noticable offset for the upper linkage location. Sadly, I don't know what aircraft it did come from.