Hi Sean, I used to use Campingaz cylinders until someone in the trade pointed out that a 5kg butane refill of calor gas is cheaper than a 1.8kg Campingaz refill. You'd have to spend €20 on a regulator to suit the calor cylinder but it will pay for itself in no time.
The 5kg cylinder is similar to those used in a Super Ser but half the size and you can swap a full size Super Ser type for the 5kg one at the Cork Gas Centre on Forge Hill.
In my case they took my 1.8kg and gave me the 5kg as a straight swap. Very happy with it too!