Looking for an MGC Overdrive gear

["Markus Stark (Translingua)" <v-markus@MICROSOFT.com> (by way of MG Car Club Northwest Centre <mgccnwc@eskimo.com>)]

Hi there

I am driving a MGC GT from '68 and I looking for an overdrive gear for
my car. I am living in Bellevue, WA and my be you know someone who wants
to sell the complete overdrive system(Transmission, overdrive, drive
shaft). Is the transmission with overdrive at a MGC the same as in a
MGB?
Do you have may be a list of used parts from your club members which are
for sale?

Thanks for your help

Markus Stark