Thank you MezzoLew for your response
I should have given a bit more details. I looked for the items online only.
I looked for a set of the swiss stop bpx flash pro at Wiggle and Amazon and basically could find only one. I bought it but it will be coming from abroad I believe rather than a UK seller. I might have found another seller which is in the UK but it was 40 GBP for a pair which is a bit too much for me.