Hold on now be careful, if you are going to start buying used. Things are not so simple While the exact Hitec I posted a link to is current and the perfect match for your Tx and yes as w8ye has indicated your JR servo plugs fit perfectly.

The problem here Hitec supremes have been manufactured in many forms in the past to include: non shift select negative shift only, non shift select positive shift only, and there was even a version specifically (and only) for the old stype Airtronics and all the power leads were reversed and positivily not work with your servos or switch harness.

As you can see the potential for wasting money buying used is high unless you know exactly what you are buying.

In your case any positive shift Hitec Rx will work and in most cases it will say JR directly on the hitec label if you look closely.

Agine the reason I recomend New folks to never buy used untill they have acquired some knowledge concerning what they are buying.

As for me I never ever purchase a used Rx. Russian Roulette is not my kind of game concerning my airplanes I have to much sweat equity in each and every one of them. This even more so now that Rx's are so cheap with the coming of 2.4. While I too am adding 2.4 units rapidly now I could never use up all my 72 stuff and will also be flying 72 probably untill I am no longer able get to the field.