Looking to find any 0.50 Cal machine gun in 1/24 scale to plus anything close to the gun in the front passenger seat of this MB Wolf. Hopefully someone knows the type and can put me right to the size and shape of it so I can maybe scratch up a copy.

Looking to trade or buy the 0.50 Cal on its own if poss.
I know there was a site that had most makes of rifles and machine guns on it and there was a way of producing a version of any machine gun designed from a pick and choose parts list. People had pics of their fave rifles and guns as avatars.
Looking to pull the info and parts together in early prep for the possible special forces campain.
Any help greatly appreciated.
Thanks
Nige