The AFV Club M41G are not AFV's own M41 but the ex-Skybow kit. This is a good thing (IMHO) as AFV Club messed up the size of their turret.
Looking at the the pictures herehttp://www.1999.co.jp/eng/10060922
the German part seem to be the smoke launchers and the lights on the front fenders. The front and rear edges on the fenders have also been re-tooled to a straight edge. This is not a problem as these are present on some ARVN M41's.
On the other hand Hobbyeasy are selling the Skybow kit for 150HKD:http://www.hobbyeasy.com/en/data/m1ekxeksws0uhuh7kx2x.html
And yes, it has the mantle cover as well.
BTW: while most ARVN M41's had the mantle cover a few of them did not. Here's a great album for inspiration (scroll down for M41's):