Manufacture as in go to site X and they have it in stock? Not to my knowledge. Last time I looked for a big corner tank the largest I could find "ready to ship" was a 90g. Everything else was made to order or custom order.
EDIT: Last time I was shopping for one was about a year ago... Ended up buying a used one locally
Yea. That's more n more common these days. "I have a HUGE aquarium" and list no details besides what comes with it. Contact them and ask for dimensions and its 55g or smaller. Good luck with the purchase. I'm bummed. Missed an estate sale where they had a 250g acrylic with furniture grade stand, acrylic sumps, and every bell and whistle to go with it and it sold for $500!!!
Ouch! Yea I would of went right then when he said they where still new. Would have pulled every favor I had and went over..... lol