@Bobupndown if you contact the gas company with your location they will give you the location of your nearest stockists.I got it from RT Autoparts in Cookstown. This is a picture of the bottle itself I believe the gas distributer is also based in NI so may have more places able to supply nearer you
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The price is similar to sgs but the agent I went to was flexible on the prices and I got some discount.
The gas company is in NI and they do a decent range of gases and I think that includes acetylene, though it was expensive!