Wonder Bar
Here's a rundown of the price of this to make.  Well, actually, I have no real way to tell exactly how much this cost.  I used the remaining 1"X1" steel tube from the Strut Tower Brace, and the 3/16" steel plate from the Lower Control Arm Relocation Brackets.
1X1 tube ~ $3
Steel plate ~ $4
First of all, I went under the car and meauered an aproximation for the length of tube I will need for this.  I don't have an exact measurement at this time, but I will guess it to be close to 3 foot.  As for the steel plates that will bolt under the sway bar bushings, I went with a good 4(1/2)"X5" piece.  I cut out 2 of these.
Step 1

Start off, by finding some sort of strong tubing.  I used some of the remaining 1"x1"x1/8" that I used for the Strut Tower Brace.

I'm not sure as to the specific lenght that I cut it to as of now.

Next, I used some 3/16" steel plate to cut out the part of the bar that will be bolted down under the sway bar.  I cut these into sort of 'L' shapes to bolt down, as well as strenghtel the transition to the bar.
When all that has been completed, you must now drill holes in the steel plate that will be bolted under the sway bar brackets.  I took off the brackets and traced them onto the plating coresponding to how they will be when installed.  I believe a 1/2" bit is used.  A little smaller size could be used for more precision, but since the bigger the bits get, the less size differences they come in, 1/2" will work just fine. 

Since you have traced the brackets/holes onto the steel plates, drill the holes and test fit them before welding the cross bar on.  After the plates have been test fitted and they fit in there good, you can hold the cross bar in and either clamp it to one of the plates, or else give it a tack-weld to hold it together. 

I'm saying this because I suggest they are welded one at a time to ensure it will all fit together in the end and that the whole unit will still be straight and the bolt holes line up correctly.

After the bar has been all welded up and fits perfectly, or else close to perfectly, you can finish it up with a little sand-blasting and give it some primer and paint.  If you are really into the project, some powerder-coating would protect it perfectly.  But I don't see why you would spend more on the powder coating than the whole bar cost you to make.