When I bought an extinguisher for the Citroen three-wheeler a few years back, the best buy was from the supplier JJC Race and Rally, Kencourt Ltd, PO Box 2333, LL11 OHB, who sold an extinguisher manufactured by Lifeline Fire & Safety Systems, Burnsall Road, Coventry, CV5 6BU. I think the part no. was JJC201-100-002