The unfortunate thing about living in Blightey is that we can't get a lot of BBQ products that our friends across the pond find easily. So if you spot Bear Paws on eBay or Blues Hog Sauce at your local Deli, let the others know here.
If you're using it to get smoke flavour into BBQ sauce, as an alternative you can smoke some onions and garlic then use them in your sauce, that will give you a smokey flavour. Also if you're making something spicy, using chipotle chilli or chipotle tabasco works. You can get chipotle chilli powder in UK supermarkets, Morrisons also do chipotle piece in vinegar in jars (much like the lazy chilli product) and Waitrose do chipotle tabasco (brown bottle).
The Calor Gas centre in southampton sell it and have an online shop. The link is below. A little tip if you are going to use it, start with a tiny amount and build up, its very powerful stuff and can easily overpower the food.