Information on Fairchild M-258 (C-138) design?

G`day gents

I am looking for information and drawings (3-view or profiles) of the Fairchild M-258 (C-138) tactical transporter aircraft design proposed to the U.S Military.
It was a derivative of the Fokker F-27 Friendship, with a variety of different powerplants (General Electric T-64-GE-8s & Lycoming T-55`s) being offered to intice the U.S services. Its other main and obvious change was the modification of the rear fuselage to utilise a clam-shell door and ramp arrangement

Thanks in advance

Regards
Pioneer