largest grow tent on the maket

What is the largest grow tent for sale on the market? I am looking for a minimum of 10 by 10. Does anyone know of a place that makes custom tents?

Ask and you shall get. http://www.greners.com/grow-tents/brand/secret-jardin/secret-jardin-dark-room-grow-tent-dr300.html

These guys have 17.8x17.8x7 http://aplusgardening.com/grow-tent-home.html

Secret Jardin makes a 10'x20'. You can also daisy chain them together and remove the partition walls to make as large of a tent you would want.
https://www.bwgs.com/details.aspx?sku=INT215&AC=1

Good luck.

thanks guys.