Almost any glazier should be able to make a tank to the size/ specs that you where wanting, its a fiddly job and they may charge you a premium for doing this for you. Or you could buy the glass yourself cut to what you want and glue it together yourself. Also some pet shops make their own tanks (well they do where I live) so such a pet shop could make the tank you desired, again at a cost.
Failing all of that I have an 18-20L tank by that came as a set for $20 from a cheap outlet shop with a small net, cheap food (threw that out) some water conditioner, 1 fake plant, and a small filter. All I did was get a small hob filter and small eater for the tank, added the coloured gravel I wanted and got a small light. My male fighter is living quite happiily in this tank with his live plants, ornament and large fake leaf that hangs over the side and rests on the water surface.
And my male fighter ate my cherry shrimp

he found them great entertainment hunting and stalking them. If you do add shrimp make sure they are large enough to not get eaten by the fighter, but also ensure that they aren't going to nip at your fighters fins. Some shrimp can be down right aggressive.