Yes they sell different size ones... you would want the small 1 gallon sized ones if your looking to use regular corny kegs I would think.. I use one of the larger carboy sized ones for my 12.5gallon stout conical.. fits perfect but its only 12" wide.
The discharge hose works better but its not as clean of an installation.
Would you mind sharing pics of the discharge hose one you made?
And where did you get the hose from?