I have been extremely fortunate to purchase terrain from a number of exceptional providers. Here are links to their website or Facebook groups “in their words”.

The Last Valley – “Hand made wargames terrain and scenery”.

https://www.facebook.com/people/The-Last-Valley/100057509227704/

Early War Miniatures

A range of buildings, flexible latex terrain roads, tracks and streams along side a highly detailed set of model trench systems held together by tiny magnets. From gun positions, to other scenic accessories covering WW1 to WW2. We use materials from resins, vacuum plastics, white metal and latex to design and make some of the best scenic accessories around.

https://earlywarminiatures.com/product-category/ewm-scenery-products-designs/

Greenfield Scenics

Hand crafted, custom made wargaming scenery and terrain for a variety of tabletop games.