Frank,
Contact Holman Moody in USA. They have a web-site and contact info. These guys currently make a MarkIIA amd MarkIIB model for sale using the same designs and specs of their winning cars(including an origional style mono,suspension, and running gear). I am sure that they can help.
On a note, I remember reading that the front mounted tanks on the MarkIIA models had some problems. That's why HM suggests that the MKIIB model that uses a rear mounted tank is preferrable, but it is your choice. Good luck and let us know what you find out.
Garry