Try the scrap yard. Round here people are trying to supplement their income (or even just get by) by going around and scrapping. We have had a lot of break ins, mostly inactive homes, where the go in and steal all of the copper water pipes.
I know of a business that just relocated and when they moved into the industrial space they found most of the large copper trunk lines (wiring) had been cut out.
CI doesn't have the scrap value that copper does, but it might be worth it to swing by the closest scrap yard and inquire. In fact this is probably the first thing the police would do, if they bother doing anything.