Is there any gearbox that is similar to the 2.4, ad says gearbox gone and I was wondering is it in another fiat. Thanks
Not sure is it manual or selespeed

I think its a pretty unique gearbox seeing the sheer size of the engine itself and i think that if you have a selespeed you could try alfa-romeo parts

You will need to know whether or not it's selespeed as they're different part numbers.

You're probably best of looking for a vehicle at a breakers with a good gearbox to source the replacement part you want / need. There are certainly plenty enough cars being broken across the UK to easily source a replacement. Selespeed would make it a little harder to find.

I dont think i've heard of an Abarth throwing a gearbox before so it's a little unusual.

You may find the box is used elsewhere in the Fiat / Alfa / Lancia family. The Coupe obviously had a five cylinder engine, as did the Marea and Alfa had a five cylinder diesel.