You need to be careful when reporting stolen avionics. What used to happen in the US was this. A thief would remove (say) a VHF with serial number 1234. He’d find a second aircraft with the same type of VHF, serial number 5678, and swap them over.
Aircraft owner number one would report serial number 1234 stolen when, in fact, it’s 5678 that’s on the market - with no record of theft.