Hi Bob,
If you go to the Plastic Soldier Review website, scroll down to the 'Accessories Manufacturers'
check out Lancer Miniatures, Linka. This might be a place to start. You might want to check out
PAPER TERRAIN :

https://www.paperterrain.com

There's also this Evan Designs:

https://www.modeltrainsoftware.com/collections/modeling-software

Do you have this model in your collection:

https://www.plazajapan.com/4968279444818/

Hope this helps!

Paul K.