I tried the hardware store and I couldn't find anything to match by eye balling it. I have no problem cutting a screw down to length, but the right gauge and Phillips head seem to be difficult to find.
Well you can go to panasonics web page and order replacement accessories direct from them. Or, seeing as the replacement stuff costs a ridiculous amount of money, ie) XLR rubber cover 22.00 plus shipping, you may want to use that money in investing in a really nice shock mount. Depending on the mic you're using, a good shock mount mounted on hot shoe will run you anywhere from 50-90 dollars. Also it gives more distance from camera allowing for those sensitive shotgun mics to pick up less motor/camera noise in quiet situations. Hope this helped.