You can check at LFS like Seaview or Rainbow Aquarium, they sometimes stock ready-made 4ft crystal tanks (braceless design) at surprisingly good prices.
Otherwise, you'll just have to get a tank and cabinet maker to custom make it as a package... check with companies like CR Aquarium and N30.
Their web links:
http://www.craquarium.com.sg/services.htm
https://www.n30.com.sg/
Bookmarks