That dimension is not a 40g. 40 breeder is 36x15x16
That dimension is not a 40g. 40 breeder is 36x15x16
According to both these sites, my dimensions are for a 40 gallon breeder
http://freshaquarium.about.com/od/aquariumsandstands/a/tanksizesweights.htm
http://www.anapsid.org/resources/tanksize.html (This one says 17" high instead of 16" but I'm more concerned with the footprint
You have the correct dimensions for a typical 40B aquarium. The only acrylic's I have ever seen came from a small custom tank shop near Pittsburgh that is now out of business. I'm sure others make them but the glass one's can be had for next to nothing on Craigslist or the Petco dollar a gallon sale.