1/48 scale Armor kit for diorama

I need some help. I'm in the process of gathering items for a 1/48 scale diorama in the PTO. I'm using a B-17 and another aircraft, either a Corsair,Avenger,Wildcat or Hellcat in the scene. I have a 1/48 scale Willys Jeep kit but I would like to add a Japanese tank or some other piece of armor to the diorama. Can any one point me to a hobby shop site where I could purchase such a kit or has someone have a kit they would either like to sell or trade?
Thanks for your help and time
ratboy49