According to his instagram posts, the screen ratio is slightly smaller than the original. The mod requires a custom ribbon created by his coworker and he has documented his progress on IG.
His Etsy store shows 600 sales with a 5 star rating from 135 people. If you’re interested, contact him via either of his accounts. The project definitely looks awesome and I hope that it lives up to the hype. The Neo Geo Pocket Color needs more love.
UPDATE: After contacting the seller, it looks like he’s charging $250 for the mod and up to $400 plus shipping if you’d like a full, assembled unit: https://www.etsy.com/listing/652010442/true-backlit-mod-neo-geo-pocket-color
To see the mod in action, check his video below: