Erwin,
Barry Ring in the UK has done a series of Trak grip tyres in 9.00-16, as well as other period correct, but newly made, MV tyres. I am not sure if he has any left. You can reach him through facebook, but I think he also has an account here on MLU.
https://www.facebook.com/militaryvehiclerepairs
Other options can be found in this thread:
http://www.mapleleafup.net/forums/showthread.php?t=6644
MRF tyres are also a popular choice for 9.00-16.