Where would I find information to assist in evaluating the value of my Spex Elf?  

Tuner1313 has a Spex Elf, I suggest sending him a PM, he has found some good info on the Spex Elf

Spex Elf Discussion  

Hi I am the one ekimball said had the spex elf. I am afraid that I can't help you with the value of the car. However I would like to get in contact with you and see some pics of your Elf. I have been in contact with Paul Deutschman one of the designers of the car and he has been a great help to me with some figures for the car. Original production was only 20 cars. He estimates there are only about 12 or so left. I will be starting an Elf registry in the near future in hopes of locating  the Elf's now. I will be sending you a PM with my email address and hope to hear from you.  

I also own a Spex Elf.  I own the one that was built for the articles in Kit Car magazine.  I have confirmed this with Paul Deutschman. I have now painted it black.  Not a big fan of refrigerator white.  

I am also in the process of putting in a stroker motor that should make it pretty quick.  

I would love to see a registry to get a good count of them.  

I have found reference to about 6 of them.  I have some pretty good information on them as well. You can find more at:

http://www.1stgencivic.com/1stgeneration_civic/models_what_is_spex.htm  

Keep us up to date if you create a registry, glad to see you guys are finding each other