Whoa!
Planning a big batch ay?
I've seen that capacity fermenters from ibrew (www.ibrew.com.au i think) but not boilers.
I would think its prob a good idea to search for 2nd hand from a business with a big kitchen (military, big nursing homes/villages, other hospitality places like hotels)
If you know anyone in the hospitality industry ask them what brand all the cooking equipment is in the kitchen and you could approch the manufacturer/distributor directly and they prob have a large range of large goodies!