Jeff
Head to the Jolly Roger forums, the forums for the Imperial Navy Elite pilots.
someone up there has the drawings (possibly fan made) for original T.I.E. , Defender, Interceptor and I think bomber variant.
http://www.jrsdetachment501st.org/index.html or you may also try www.omegawing.net which is a subgroup of the unit. You will need to join the forum to post, head to the boot camp section. These people live and breathe T.I.E. variants and are willing to help.
HTH
David (Future member of the 501st and JRS)
Build to please yourself, and don't worry about what others think!
TI 4019 Jolly Roger Squadron, 501st Legion