Staysail-foot boom(s).
I'm sorry I just now noticed this. I have three surplus booms cluttering the stairway in my apartment. Two are the Kenyon D section; one is (I think) a Kenyon A or B. I had them listed on eBay but they all wanted me to ship them UPS ($$$). Let me know if you're still in need.
BTW remember that Rig-Rite is no bargain, ever. I do not know that they actually have stock in these 30- and 40-year-old parts; I think they have them fabbed when they need them and that accounts for their exorbitant pricing. DAMCo (Dwyer Aluminum Mast Co) and others provide virtually the same parts (including spar sections like nearly all of the Kenyon ones) for very moderate prices. See their site.
Also-- the boom you are looking for is properly called a staysail boom, or a staysail-foot boom ('club foot' is sometimes considered in bad taste and I don't use it). 'Cutter' refers to the configuration of the rig, not to any of its physical parts. The inner forestay is called an inner forestay, the sail is called an inner staysail, and the boom is called a staysail boom or staysail-foot boom.
I have heard people refer to a double-headsail ketch, like the C44, as a 'cutter ketch' for decades. Again, this is just wrong; but go figure.
A sloop has one headsail on one stay. A cutter has two, on separate stays, each doing to a different part of the spar so that one is subordinate to the other. A 'double-headsail sloop' may have two headsails on two separate stays, both going to the same point on the mast. They may be side-by-side or sort of in tandem, going to separate places at the deck. This is rare now but occurred often in England before and after the War. Many long-distance cruisers prefer it.
