Calor Gas Regulator (Butane) & Calor Gas bottle (Bellevue EH7)

Hello, I'm hoping to convert a dual burner camping stove to Calor Gas. For this a Calor Gas regulator and 15kg, 7kg or 4.5kg Calor Gas bottle are required, (empty/part filled, not full, as I will need to transport them with a bicycle). The stove is a Campingaz, 'Camping Chef' which currently takes Campingaz 904/907 bottles, which would also be very useful at the moment. Many thanks to anyone who has these items spare.