I agree wait for Kenny, he is selling them, and will appreciate your interest and may have already put them on a Commando.
But I reckon the first thing Kenny will do is ask you what your specific application is, meaning, will you have a kick start on your bike? If so the first issue is the need for a folding peg and a way to clear the kick start with the lever. The much less attractive older style 'John Tickle' or 'Unity Equipe' 60s and 70s rearsets are shaped the way they are for a reason. Typically a bent steel rod is run over the top of the kickstart where it turns down and the toe peg is welded on.
If you never had to fold the foot peg up and down on a daily basis you may not realise how much hassle that might be, but there are plenty of Featherbed and Commando Cafe racers and Commando Production Racers out there. Look at pictures! That part is fun and very easy 8)