I wanted to share what I found out. The original shocks were Carrera 3255. They were discontinued years ago, but they are intermittently available in this auction:http://www.ebay.com/itm/Car...AOSwYlJW4YUu&vxp=mtr
You will have to change the top mount off of the existing shocks. Of course, when I needed them, the auction said that they were sold out, so...
I called QA1 because they bought Carrera in 2004, and the tech guy told me that these Carrera 3255s had been discontinued for some time. In fact, I don't think they actually Carrera brand shocks anymore at all. The replacement QA1 shock is P/N 7555 (~$98), and to adapt the top mount to a stud-style as needed for our cars, the kit P/N is MK13 (~$14). These shocks are non-adjustable, and are slightly stiffer than the middle setting of the Carrera 3255.
The aluminum, adjustable QA1 shocks are DS401 ($160), and the kit to adapt them is SS110SDM ($35). I went this route, but it is important to note that the lower perch doesn't go as low as it did on the Carreras and I actually had to buy new Eibach 6" coilover springs as well ($120/pair). So, in the end I spent $500 instead of $140 if those stupid original Carreras had been available when I needed them. Yay. At least I learned a lot. Thank you all for the help!
More info at: http://www.fiero.nl/forum/Forum1/HTML/043357.html