Give them a call. I visit this store all the time and they have a bunch of parts in the back to make what ever you want. It says NY but the store is in CT.
I have a pond pump in a 100 gal tank. Even when it's 20 degs out,only the top 6 " freezes so i just punch a hole through. Look behind a water company like Culligan because they throw out tanks all the time.
The Blichmann works great.My bottles easily stay carbed 4-5 months. Make sure the beer is carbonated correctly at least 2-3 weeks before bottling. Each time you use it may require different adjustments.