G'day ,you in OZ or NZ? ,whereever that pr### is,get in touch with the local Police and lay a complaint,they're all online these days so it's no big deal to get a copper in another country to chase it down for you.(he's in South Africa BTW,some real shonks there have been targeting classic car enthusiasts recently) In OZ the Police will refuse to deal with it because it would be called a "civil matter" ,not a 'crime' when it is as complicated as fruad.If you're in OZ try German Wrecking at Rocklea (Qld.) or Dave Walton spares at Nerang(Qld.) ( cheaper to deal with )
If you get stuck and your carby is playing up ( too rich etc ) it can be fixed.
Although the other guys mention Holley conversions etc it's going to cost you plenty down under as Holleys are seriously expensive.I have had a couple of M110's with the holley and it's the expensive 400CFM 4bbl carb you need.That will cost you value of your car...and linx, now called Redline performance ,Sydney,made an adaptor to suit.
If you need the Solex 4A1 ,get your money back and buy CTH's ,I know this guy and he's straight up!. ( right Charlie? )
In the mean time ,read this everyone,I used this info to get my 280 running perfectly ...once it starts on cold mornings.
http://e21.tricord.be/e21/about/m20/solex-carb-notes.php