Gears & Guts gives you night specs with their UhU Night Vision kit.
From the update:
Gears & Guts (Company B) is pleased to announce the release of its 1/56th scale Falke/UhU Night Vision system accessory kit. The kit fits all JTFM tanks kits, and is compatible with most 1/56th scale vehicles. Now you can own the night in your games with the Night Owl vision system! The kit retails for $6.