So, I was thinking about doing this mod, and it occurred to me that aftermarket tie rods are probably everywhere. Turns out that they are.
You can buy threaded tubes of just about any length (reverse threaded on one end and forward on the other end), and heim joints here:
http://www.speedwaymotors.com/m/105_Rod-Ends-Heim-Joints-Sleeves.html
If you buy the good stuff, it looks like it would cost about $45 + shipping.
Now that I look at it again, I'm not sure they have the right combinations of shanks and holes in the heim joints. I'm going to spend more time on it later. I'm sure someone makes something that just screws together out of standard parts and fits.