I am surprised how some researchers in China and Taiwan can survey 1000 manufacturing firms (see Cheng, 2011; Li et al ,2011; Li et al 2014) but young researchers over here in the UK are finding it a big challenge
You can contact the supply chain professionals group through social medias such as LinkedIn Twitter. Also you can contact the UK companies directly and ask them to forward your survey to their supply chain employees.
I think it's very easy. you can do that from LinkedIn by send the link form (google form or Survey Monkey). Then you can send the messages for all the people.
you can filter the people like ( location, position ...etc) .