Cisitalia Club of North America
Re-Originals in Houston Texas is a good supplier of obsolete Italian car parts, and they occasionally have parts specific for Cisitalias. Contact them at 713-849-2400 (phone) or 713-849-2401 (fax) and please tell them that we sent you.
A Profile on Cisitalia was published in Sports Car Market Letter in October, 2004, Vol. 16, #10, pages 42-43.
A new Profile on Cisitalia has just been published in Sport Car Market Letter December, 2006, Vol. 18, #12, pages 54-55.
Given the tight history between Abarth and Cisitalia you should check out the Abarth Enthusiasts Worldwide website.