I only have an old SiFab price list from 2020. I can tell you the 3.7 Roadster aluminium radiator was the same price as +4 GDI. I would expect Mulfab one to be around £600 now inc.VAT. Suggest giving them a call as there seem to be pages missing on their website at present.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone