Sorry about the loss of your rings
. My mother had her purse stolen last year and it had my grandmother's engagement ring in it-worth much more than the lousy 1000$ the insurance co. gave us (we did look at pawn shops initially but in San Antonio there are 100's of them). I am having all of my jewelry appraised and getting separate insurance for it so if anything were to happen I will at least recover what the jewelry is worth. Of course no one can pay for the sentimental value. Good luck-personally I would show up at the plumbing company and insist on talking with the owner (would also have a witness with me). If he/she isn't present then I would camp out.