If you're displaying translites midcoastsurf makes backlit frames that are pretty nice: https://pinside.com/pinball/forum/topic/lit-frames-led-backlit-translite-frames
litframes.com
Stern also sells backlit frames to fit their translites- https://shop.sternpinball.com/products/led-back-lit-translite-frame-lcd-game-display-style and https://shop.sternpinball.com/products/led-back-lit-translite-frame-dmd-game-display-style