I am in the process of using Regalaze, if my prescription was not so awkward the replacement lenses were starting at £15 a pair delivered. For that you could have a pistol one and a rifle one.

They are very helpful and the chap I spoke to was Chris. He did however say I needed a plus 3 step on my prescription, but after talking to RobinC the other night he said I needed a plus 2 step (+50) to be added, I have contacted them so hopefully it will be rectified...

Thanks Robin