I had a pair of mini mole grips (vise grips) with me at the time.....
I now carry a magnet for finding stuff - iron, steel, nickel, alloys of same & the odd bit of cobalt of course.
At a fine BSA parts emporium which I won't name I was advised to invest in a GPS to thwack when a part left the bike and go back with a metal detector!

So far nothing has fallen off my trident except me - had trouble finding that too!

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Anyone want to buy a 100 volume encyclopedia? don't need it now as new wife knows everything.....