Can you give us an overview of everything you already have? That will make live easier for us.
I was going to do that!
Let's start with models known and well documented:
ItalyCoachbuildingsBertone - 125 Executive
Eurostyle - 125 coupé 1968
Francis Lombardi - 124 Smart
Michelotti - 125 coupé 1969 & 1970
Moretti - 124 coupé, 125 coupé GS 1.6, 125 coupé with 128 body, 125 S coupé
Pininfarina - 124 spider, 124 coupé, Spidereuropa
Poccardi - 124 Shopping, 125 Shopping, 124 coupé
Savio - 124 coupé (1968, only: older pictures missed!!!), 125 coupé, 124 giardinetta
Scioneri - 124 coupé, 125 coupé
Touring - 124 cabriolet
Vignale - 124 Eveline, 125 Samantha
Zagato - 125 GTZ coupé
OffroadsCMG
OSI - 124 Cross-country
Utility carsBoneschi - 124 & 125 ambulance
Fissore - 125 station-wagon, ambulance and hearse
Grazia - 125 ambulance
OSI - 125 Estate-car
Savio - 124 Savana
TuningsGiannini - 124 saloon
Radbourne - 124 saloon Abarth
Scotti - 124 & 124 Spider
Single-seaterAbarth - Formula Italia
OthersFNM - 124 Diesel
Italmolle - 124 engine with rotary timing
GermanyWochner - tuning kits
SpainSportscarArtés - El CampeadorSerra - 124 Sport Cabriolet
Talleres Hispano Aleman - Castilla
TuningsDdauto - 124, 1430, 1600 Rally, 1800 Rally, 1800 Formula
de Cos - Alpine A110 with Seat 1430 engine
Hispakart - 1430
Juncosa - 124 & 1430
Manso - Alpine A110 with Seat 1430 engine
Movi - 1430
Scratch - 124 ,1430 & Alpine A110 with Seat 1430 engine
OthersAutotécnica - Artefcato & Chitty
de Cos - barchetta “Adidas”
Iresa - barchetta under Torralba license
Naia - barchetta with Seat 1430 engine
Speedwell-Noguera - tubular barchetta with Seat 1430 engine
IndiaPCB - spyder and coupe-cabriolet on 118NE base
United StatesArcher - kit-car with 124 Spider body
John Rich - tuning kits
Serra - tuning kits