Today three cars where I haven't been able to find a builder:
18arb: Said to be a 1956 Alfa Romeo 1900 Barchetta, engine block is from a 1952 AR 1900 Berlina, but the head is from a FNM 2300, so probably from Argentina too.
23arb: Alfa Romeo 1953 Barchetta Modificato 1900, number plate 961 UYR, built recently, registered in the UK and is documented on the V5C as a '1953 Alfa Romeo 1900'. the engine is Alfa Romeo's classic four-cylinder, twin-camshaft unit derived from the 60's Spider model.
25arb: Alfa Romeo 1900 Barchetta Frianchistretti Replica, Tube Frame, 2.0L Alfa Engine and Alfa Gearbox, Body is Fiberglass, inner fitting is in Aluminium. The car is right from Argentina.