If you are looking for Gloucester Old Spot pigs for sale or hire then here are a number of contacts that may be useful.
A good place to look is the BPA http://www.britishpigs.org/pedigree.htm Click on their search for pigs box and put in the details they require and they will bring up the pigs available by their members.
I have had someone with a herd of Gloucester Old Spots register on my forum and they sell pigs but will also help to locate GOS pigs as well. http://www.pigletspen.co.uk
Another contact for Gloucester Old Spot Pigs is the Gloucestershire Old Spots Pig Breeders’ Club where you will find a register of boars at stud in your area at www.oldspots.org.uk