Leather to Patch my Sofa Arms (Denton M34)

Hi all, I am looking for some decent leather to repair or replace the worn & torn leather on the arm of my sofa. The picture shows the colour of my sofa but any will do (beggars can't be choosers as they say) If you have an old leather sofa that you need to get rid of, I could cut the leather off and cut the complete sofa up into manageable pieces, ready for going to the tip, but I am unable to take it to the tip myself. Thanks in advance. Geoff