Here is the list and how I arrived at it. I spent about three hours at O'Reileys looking at every CV axle known to man. I narrowed it to axles that had 27 splines on one end but they had about five different styles on the other end. I then narrowed it to the ones with a flange style fit on that end. It did not matter the bolt pattern in the flange, I knew that an adapter would be cheap and easy, especially compared to custom axles. Turns out the list is for BMW Seven Series axles, a car of substantial weight and power. The axles are 1-1/8 diameter and a nice fringe benefit is the small size boot on the outboard end. It makes it easier to clear the shocks. These dimensions are for overall compressed length, so subtract about 4-1/4 to get a ballpark face to face dimension.
These fit the 27 spline C4 (I think, can never keep 4, 5, and 6 straight) The C5 (I think) has 30 splines and an ABS built in. It is a few dollars more but I have been intending to repeat this effort for them. My hope would be that I can find a 30 spline with the correct flange bolt pattern on the other end and put my bud Eric out of a job making the spacers.
60-3082 19-13/16
60-3136 20-1/8
60-3354 20-7/8
60-3535 20-13/16
60-4201 28-1/2
60-8025 24-11/16
60-8030 24-5/8
60-8073 24-1/4
60-9094 20
60-9095 24
60-9096 23-15/16
The axles are under $50, the hubs under $100, and the April 2012 Kitcar Builder that is now available online has an article that I wrote showing how to build a spindle (upright) fitting that hub for $9.73. Good luck.