Think I found a good solution as the Diane hair shapers only seem to be sent from outside EU risking customs costs.
How about these? Personna hair shaper blades, if I get 120 blades they will be 36 pence each (roughly 51 eur cent each)
Personna Stainless Hair Shaper Blades

They also carry "gem" Personna blades, much cheaper but I'm not sure they are meant to be used for shaving.
So many choices in single blade land...easy to make the wrong choice.
GEM by Personna Stainless Coated Single Edge Razor Blades