The black handles with the G3 metal carby gear on them look to have the latch ends for a MKIII VC-160, the VC-Mutsang, Series 70 & 80 Mustang, and the Series 70 Sports (Plus a few others)
Nice collection of spares there too.
If you have any trouble with the Ryobi Red, Let me know, i may be able to help out. (Might have carby spares, depending on what carby you find in it)