The type of regulator depends on if you are keeping with butane as the Camping Gaz would be or are using propane.
Calor's butane come in blue coloured bottles and there are different butane specific regulators for the small bottles and the larger so care is needed.
Calor's propane comes in red coloured bottes but independent of size they use the same propane specific regulator.
It is in reality not complex just needs being aware and buying what is needed.
Replace your regulator with an EN417 regulator. This is a standard EU fitting, screw-in, which will allow you a wide choice of butane/propane cannisters at much less that Campingaz prices.
Cost about a tenner, just Google for outlets.
For something a bit bigger, a regulator for 4.5Kg Calor containers will do the trick.
------------- Camping Gear expands so as to fill the space available for its transportation.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets