Thanks for letting me know.
I did more research into it, with the help of Matt, and the fitting required is apparently an M10 style. Nothing internal lists that as an available part.
There is something interesting Matt found. Its about the LQI. Try it.
1. Confirm the remote control is linked to the ViP 922 receiver. Linked remotes are shown on the receiver’s System Information screen (accessed by pressing MENU-MENU on a linked remote or SYSTEM INFO on the receiver front panel).
2. Press and hold the SAT button for several seconds on the linked remote until all the mode buttons are lit, then release SAT. The SAT light blinks.
3. Press and hold the Input/Recover button for several seconds until the SAT mode light blinks and then stays lit. Then release the Input/Recover button. The remote control is in LQI mode.
4. Make sure you are at the correct TV viewing location for this remote control (TV1 or TV2).
5. After about five seconds, the remote control will provide feedback on its range to the ViP 922 receiver, as follows:
Three mode buttons are lit
If three or all four mode buttons are lit and the speaker is beeping rapidly, then the remote control is well within reliable operating range.
Two mode buttons are lit
If two mode buttons are lit, you may want to reposition and/or reorient the antenna and extension cable to try to improve range, but remote operation should be adequate from this range.
One mode button is lit
If one mode button or none is lit, the remote may not operate the receiver. Check the connectors and reposition/reorient the antenna and extension cable to improve remote reception.
6. Press any button on the remote control to exit the special LQI mode and return to normal remote operation.
Try this out, let me know what you find. I will check in my little bag of tricks to see if I can find the random part number listed for the extension kit (might be the one sent already, just needing the M10 fittings instead).