Parts:

Pump:
There are several places to get a pump. Checkout the site http://www.rbracing-rsr.com/waterinjection.html. They have been doing this for quite some time. They suggest using the ShurFlo 60psi bypass pump

 

Nozzles:
Nozzles: Misting nozzles can be found at http://www.mcmaster.com/ . Get the stainless steel version - 3178K41. It has a low flow rate of 1 gph (gallon per hour) at 100psi, so you don’t have to worry about to much fluid be sprayed in.

  
Hose, Fittings and Solenoid Valves:
There are a few sites for these. I got my hose from http://www.poweraire.com/ . As far as solenoid valves and fittings there are many choices, one more expensive than the next. I searched the net for places to buy quality valves and fittings for less. I found http://www.stcvalve.com. Their prices are very reasonable. Valves are $19.00 and fittings are competitive.		  
Fuel Filter:
Professional Products Powerflow Inline Performance Filter with 3/8-NPT Ports
http://www.cnc-motorsports.com/product.asp?ProdID=15320

 

Controller:
As discussed on the instruction page, there ar many controllers to choose from.

http://www.alcohol-injection.com/progressive-controller-14.html
http://www.enginerunup.com/shop.php/parts/c_3.html
http://www.coolingmist.com/pagedisplay.aspx?feature_key=controllers

http://www.labontemotorsports.com/store/ccp0-catshow/injectionSystems.html

  
RPM Switch:
Without a doubt one of the best buys on an RPM light. Other major companies charge over 100.00 for something that does less. Kudos to Harlen Engineering. http://harlan-engineering.com/store/store.html
  
Voltage Regulator:
This is the kit I used to build the voltage regulator on the throttle body.
http://store.qkits.com/moreinfo.cfm/QK68
  
Overflow Tank:
This is a washer fluid tank from JC Whitney. Just type in the search field “ELECTRIC WINDSHIELD WASHER”, It costs about $20.00.
  
Float Switch:
Google plastic float switch. I found one here, http://www.aquahub.com/store/ifloatfloatswitch.html
  
Timer:
Google 528T Pulse Timer. There are sold at car audio sites for around 15.00
  
Fuse Block:
There is a newer version of the one that I have. It has no cover and no negative bus, which isn't needed anyway.
http://dogbytecomputer.com/xcart/product.php?productid=16456&cat=0&page=1. Check around the site for other Blue Sea Systems.
  
Solenoid:
I found solenoids on Ebay. Just do a search for continuous duty solenoid. They run about 15.00		  

Hook Up Wire:
I found a guy on Ebay that was selling packages of Automotive Electric Primary wire in all kinds of gauges.