So, I dug through my computer where I remember making a list of parts, prices and websites, and didn't find anything. The best I can give you is the process I used to pull the list together.
System Design:
There are plenty of DIY websites that want to sell you the kit for you to install yourself. These are relatively helpful in that they will allow you to spec out your system and get the parts list. The key is that these sites don't give you the full specs on the parts (i.e. pump pressure, and flow specs), but will sell you the parts and a decent markup. I recall going through several of these sites, until I got a good idea as to what the specs on the pump were.
Nozzles and Tubing:
These are easy to find on any number of websites. They generally give you the flow rating for the nozzles, but the operating pressure is harder to find. My recollection is that they ran between 100 and 250 psi, but that would DEFINITELY require verification. The flow rate on the nozzles are really low ( I recall 0.05 gallons per hour).
Pump/motor:
The maximum flow rate of the nozzles combined with the maximum number of nozzles This combined with the maximum number of nozzles for a 1/2 hp motor and pump combination will point you to the right direction for pumps. As I recall, I ended up finding pumps and motors on the Grainger website. It took a bit of searching and relearning about pump curves to pick one.
Controller:
The controller was hard to find, and I never did find the perfect fit. The requirement for the controller is to be able to control a decent size motor, AND have the ability to control to like 5 minute run times, multiple times per day (dawn and dusk). The recommended run duration can be obtained from a number of the DIY websites.
Tank:
Plastic drums were easy enough to find, or you could even use a garbage can.
In the end I was guestimating that I could probably save almost 25% on the price of one of the DIY units. At the time it was worth it, as I only had 1 kid and some extra free time. Now, with a second kid and limited free time, i would probably buy one of the prepackaged systems and install it myself.
I hope this helps even though it isn't what I had hoped to provide.