"X" denotes the paint color, black. The 5 digits represent the sequence number for your 1182, starting at 2001. So 1182-3000 would be the 2000th 1182 built, and so on. No help on the other notations. The VN and the theft-proof numbers are two entirely different numbering schemes for different purposes and are not intended to match.
Highest numbered 1182 known to me is 1182-19909 with theft-proof 478891.
If no one comes forward with the info on the source for the decal, I'll take another look later today or tomorrow.
PS - source for decal added.
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