This lists an address to order from but is a few years out of date...Might still be worth contacting.
http://boards.ancestry.co.uk/topics.occupations.harnessmaker...Another option is an inter library loan.
Worldcat lists this being available in a number of libraries
https://www.worldcat.org/search?qt=worldcat_org_all&q=Pa...You would need to order it via your own local library.
Hope this helps
Jacki