Can get NIB Chewlixes, but Taito stopped making the Vewlix cabs, meaning that last run of NIB Diamond Blacks was the last of them.
You may find some from collectors that are still NIB and haven't been opened from that run, but there will be a premium for them.
There are plenty of really clean vewlixes including some that have had most of the work done already, you just have to keep a sharp eye, and be financially ready.