Here in Manitoba the FGH ones made it into the local military scrapyard. You would likely have to wait until spring to get one.....too damn cold here now.
I also have the CFTO detailing the installation of the mount if you need it when the time comes. The mounts were almost exclusively for the militia light recce jeeps, and not simply mounted on a whim to other unit's jeeps. I remember seeing one on a M151A2 when I was in Gagetown, but they weren't supposed to be installed on the thinner sheetmetal of the MUTT.
Of course, along with the MG mount, a recce jeep would also have to have the wire cutter installed on the front bumper (gives you something to shoot at).
I have the semi auto 1919A4 to go with my Jeep. When I take it to the local range, it is always a crowd pleaser, with a lineup of guys wanting to shoot it.