I personally have a MotorCycle Cruise system on my bike. They have their own switch panel set up that has worked flawlessly since I bought it back in 2007.
However, Forum member
FarWestFastEddy has a single toggle switch set up on his '07 FJR Rostra CC set up. You may want to PM him for the details.
Check out this post...
https://www.fjrforum.com/forum//index.php/topic/139768-cruise-control-in-nashville/?p=887266
Suggest 1 toggle switch and mount it in the cover plate on the left switch pod at the index finger position on the far side.
I don't know for sure what switch is pictured above, but it is a fairly cramped location.
The following may or may not work...
McMaster-Carr - Catalog Page 918 (noted earlier)
Three Position—Switch is Off in Center Position
Off or On On or Off Springs Back to Center 3 SPDT (ON)-OFF-(ON) 5 5
7535K54 38.08
Miniature Mil. Spec. Toggle Switch, SPDT, (On)-Off-(On), 5 Amps At 125 VAC
P/N 7535K54
Also consider a cover for it...
For Mil. Spec. Switches—To Order: Specify black, gray, red, or white.
70205K4Each4.20
Toggle Boot, 15/32"-32 Bushing, .94" High
P/N 70205k4
Hope this helps.
Brodie