2002 2500HD GPS/ON-STAR Antenna

[phxphk]

Hi , I just had my 2002 2500HD GPS/ON-STAR Antenna stolen after 10 years, and was wondering if anybody knows where i can get a replacement other than the dealer, I'ts the 3" black antenna on the roof above the drivers side.
any info would be great. also if you think i could get one from a wreaking yard, i tried looking in my area with no responce?

Thanks