Which tank did you end up ordering? I don't think you made it clear.

Tankzone, for one, has extra accessories like jerry cans, helmets and K ration crates made out of white metal:
http://www.tankzone.co.uk/cart/tz_henglong.htm

The .50 cal machine gun is removable from the hull (it comes separately) but the rest of the crates and ammo cans are glued to the hull of the Pershing. A lot of people have removed these altogether or placed them according to their own desires.

You can do a really good paintjob either on a Bulldog or Pershing with paint from Wal-Mart--just pick up a 12 oz. can of Krylon Special Purpose Olive Drab from the hardware section and use it. It is a very close match to WWII OD. No need for primer, just spray it directly on the tank.

If you need some .30 cal ammo cans and helmets from an original HL, contact me by PM as I'd be happy to send them your way.

P.S., that last pic is an original K-ration crate (er, repro made from original pattern)...

-Harq