Comcast iNET Contact

Hello, I'm a network engineer with a county government and I'm trying to get in contact with someone from Comcast who can provide a .KMZ or similar of our iNET (Institutional Network) dark fiber. I've called through the normal support lines and gotten bounced around a few times... Which isn't surprising... This stuff is 20 years or so old. Thanks in advance! Cheers, Stephen //please pardon any brevities - sent from mobile//