I have a Neo Geo Pocket Color with a Crystal Blue case and it was dismantled for a while because I had to clean and fix some parts. So the back part of the case was lying around and was near a heat source and partially melted! Yeah, that's stupid! So any suggestion what to do? The plastic shrinked, so I don't think it can come back to its original shape. It's pretty sad, I bought it in brand new condition for 500 yens a couple of years ago(probably around 20$US with shipping), now I can't even fin a junk one for that price. The best would be a non-working NGPC in the same colour! If anybody see one, hit me up.
Maybe You'll find one here http://www.satakore.com/buy-snk-neo...games-on-the-store,,55,,video-game-store.html
Prices are so high these days. I guess I'll have to wait until I buy a new one and keep this one for parts.
Finally found one that was not too expensive. around 40$ with shipping. God they are expensive these days. I lost a lot of bids on Yahoo Auction Japan and on eBay around the world. People are willing to pay over 80$ for a OK condition NGP. I regret messing up mine so bad. Well, on the flip, side, I have a bunch of spare parts! Be careful with your NGPs, they are starting to be precious.