Perhaps if Templar told us if he wanted a US M2HB .50 cal, or a German MG34 or MG42, or possibly the modern MG3 from the Leopard line?

The US .50 is still available from Tamiya, but its often on backorder (0225094, W & Y sprues) and if you're in the US, it can often be ordered cheaper from Karen at the AAF Tank Museum PX. There is also a metal-cast version, but that runs upwards of $30

The German MG42 can be scavenged from a Tamiya figure or from the King Tiger, but is also reproduced in metal from said parts. Prices run about $15 bucks; check out the RC Panzershop ( http://www.rcpanzer-shop.de/ ) Markus is a good guy! The MG34's around seem to be repro'd from the poor Bandai one, and if you go that way, may as well blow for a Verlinden one and get the ammo boxes too.

The MG3 from the old Leopard 1A4 is out of stock, but its being repro'd in metal as well, runs just over $20 US a pop, but comes with everything to put it on the turret ring-plate of either 1A4 or 2A6. I cannot report on it yet, as I'm awaiting the end of the month to see if funds are available for order (Need a few for resto of my pair of 1A4's)

Hope that helps ya out.