You can get copy of original homologation from your national MSA which is affiliated with the FIA. For the USA this is either the AAA or the ACCUS. Keep in mind that the FIA class F ends 31.12.1965, so only homologations up to this deadline are allowed.
The full FIA Appendix K regulations you can find at http://www.fia.com/regle/annexe_K/Appendix-K.htm
E-Types are often basis of technical discussions in historic motorsport, so take care about the special exceptions for this car listed in appendix VII.