Thanks for posting this Bart.
Vehicles are mainly Corgi or Solido. The German trucks were from a publishing part-work and appear every so often on ebay. They are, I think, actually 1:43 rather than the usual 1:50.
The scientists are from Pulp and, I think, Artizan.
Glad you liked the scenario. I'm only sorry that Bart's Wermacht never got the chance to attempt surrendering to the Allies.