Maybe I should write copy for Dave!
I've not read the official Monette marketing for their mp's but I know this Aegis mp is the bomb! I asked Alex if there was a lead piece in the Aegis blank. Right now, the F2 is the only size, the last time I talked to Alex he said he is busy getting the F2 into the hands of all the people who want to maximize their ZeuS horn's performance. Alex said in the future he would try to design a lead piece but from that conversation I got the impression he's not going to get into the whole mouthpiece design/size thing.
So. if you need a Monette size I'm sure Jim at Kanstul will make one. I know, according to their Mouthpiece Comparator, they have it scannd so I would imagine you can order one in that size.
http://kanstul.net/mpcJN/Compare/CompareIE.HTM
Try Alex's Aegis, you might not need to pay the big bucks for the Monette of have it copied.