I've used Technologic Systems' hardware for decades:
http://embeddedarm.com/
Quite a selection to choose from. Fanless, -40C to +85C. Should be able to do what you need, and they keep making their products for many years, so you'll be able to get replacement parts in the future.
I've used Technologic Systems' hardware for decades: http://embeddedarm.com/ Quite a selection to choose from. Fanless, -40C to +85C. Should be able to do what you need, and they keep making their products for many years, so you'll be able to get replacement parts in the future.