David S - yes I'm aware the plate/tray on the 1x6/7 is like an upside down version without the additional 90degree rolled sides of the 1x8/9 or Quiet Lines. This leaves the rubber bumpers for the 1x6/7 series to be installed onto the fender panel and why the parts list shows them as part of the fender panel.
I think Doug A's pic is of the correct bumper for the 1x6/7 series. I believe it's a little larger than the version for the 1x8/9 and Quiet Lines, and has a hole in the center as well. I have some recollection of seeing that version before.
For what it's worth and to annoy the Correct Police, there is a better version that could be used on all these tractors with a similar seat plate or tray. It was 1st introduced by IH as a hood support rubber bumper during a mid-production change to the Quiet Line series. I see it is now shown as Part No. 735-3005 (but I need to check my CPE paper copy for any old part number). It is unfortunate that it's also NLA but there may be some out there or maybe it can be easily made.
It's a rubber block approx. 1/4" W x 1/4" H x 3" L (maybe 3 1/2"). It gets glued (Loctite) to the hood support bracket that is bolted to the pedestal. When it's used on the seat tray it gets glued to the underside edge of the seat tray where it contacts the fenders.
I don't know if IH made a change and used it on the seat tray but it shows as part of the seat tray for the 82 series. I suppose CCC could have made that change since it shows a type of CCC part number.
I know these rubber blocks work great as seat supports because when I bought my first 1450 in 1988 these bumpers came on the hood support and on the seat tray, and they never wore off, never worn down, never budged, and were still on my 1450 when I sold it in 2002 and moved out here to the Left Coast. (They had to have been glued on with the Loctite noted in the parts description).
I believe I have a couple of these rubber blocks and I'll see if I can get a few pics tonite after I'm home, unless someone else has a 782 or a CCC unit with these and they post pics of theirs. They sure work awhole lot better than the original little round rubber bumpers, that seem to go flat in about 2-3 years of use, or they stick to the fender and tear or break off.
Anyone out there got a method or machine to cut rubber? Can't leave rough edges. Needs to be really nice and smooth as you should be able to see in pics. It would sure be nice to make these available again. You would really only ever need to buy one set.