Okay, that is just the one FEP/FSP member Ausfox had one up for grabs.
http://www.mustang.org.au/forum/index.php?topic=22144.0
The whole cut-off only some of your "logotomy" was originally the Blattman conversion found on XM 170's from 1964 onwards, and is listed on the Hot 6's Street Machine book in Page 91 in black and white. In that book, it has a steeper draft angle, and a hand fabricated intake manifold for three H6 SU 1.75" Carbs.
Lynx Corp had its own alloy casting factory, and since everyone was working inline Fords, Holdens and Valiant's back in the 60's and early 70's, they just copied the Blattman kit in cast alloy, which allowed even bigger Jag/Aston Martin/Van Den Plas HD8 SU 2" carbs to be bolted up.
221's were a really common candidate, and Graeme Nichols from Lynx Corp in the Hot 6's said they used to do heaps for the speedway guys.
See this
http://www.streetfords.com.au/forum/vie ... 0&start=10
Street Machine Performer Series: Tough 6's.
C.1990 from what is Phil Scoots ACP Mens these days.
Bar code 9313006003663
In that book, which I know you have, Graeme Nicholls from Lynx Corporation, on Page 9 and 10, Extra Dimensions and page 92, Mix Mastering.
And there were comments from Tim Howarth in the last article
Carburettor Service Co Pty Ltd
(02) 9747 4066
240 Parramatta Rd
Burwood NSW 2134
http://www.carburettorservice.com.au
He is one of the most knowledgeable people in Aussie when it comes to carburetors.
He might even be able to help you out with a raft of SU carburetor back-up parts.