line reducers for plumbing

I am making a HLT and MLT out of used commercia l sink I obtained from a restaurant that closed down. It has two sink compartments and a side board. The sinks hold about 14 gallons each so I should be good for 5 gallon batches. I am planning on making it an electric HERMS system. The sinks have 2 inch male threads on the drain. McMaster has a reducer to 1/2" but it cost close to $60/reducer. Anyone know if another fitting site that may have something cheaper or another idea for coming out of the bottom?

Can you post a link to the reducer so we can see exactly what you need?

The link does not go directly to the page. Hopefully this works.
You can put the model number in the search field and it will go right to it.

http://www.mcmaster.com/#stainless-steel-pipe-fittings/=ertpa1

Stainless Steel Pipe Fittings and Pipe
This product matches all of your selections.
CAD|Catalog Page|Bookmark

Model: 4464K453
Each
In stock for $51.31
Shape
Coupling
Coupling Type
Reducing Coupling
Pipe to Pipe Connection
NPT x NPT
System of Measurement
Inch
Pipe Size
2" reduced to 1/2"
Material
Type 304 Stainless Steel
Maximum Pressure @ 72° F
1000 psi
Maximum Pressure Note
For steam, maximum pressure is 150 psi @ 366° F.
Flanges
Use low-pressure threaded stainless steel
Specifications Met
American Society for Testing and Materials (ASTM), Manufacturers Standardization Society (MSS)
ASTM Specification
ASTM A182
MSS Specification
MSS SP-114

These look pretty good. About half price of the ones from McMaster.
http://www.fastenal.com/web/products/detail.ex?sku=0464763&ucst=t