Strange sized feet, struggling to find shoes!

I have a pair of shimano R087 Wide fitting shoes (EU42/UK 7) but after a few rides and trying different adjustments I think they are too narrow for me. I have spoken to a couple of cycling shops today who advised that a Shimano wide is similar to a regular in other makes of shoes.
I have just looked on the lake site and done the measurements and I have one foot which is 96mm wide and the other is 104mm wide, I also have completely flat feet which doesn't help, according to the lake size chart I would need an 41.5EU Wide to get the right width but an EU39.5 wide for the right length.
I am near blackpool and not sure of any local stockists for lake shoes, can anyone suggest any stockists or alternative brands to look at/try on.
I have just looked on the lake site and done the measurements and I have one foot which is 96mm wide and the other is 104mm wide, I also have completely flat feet which doesn't help, according to the lake size chart I would need an 41.5EU Wide to get the right width but an EU39.5 wide for the right length.
I am near blackpool and not sure of any local stockists for lake shoes, can anyone suggest any stockists or alternative brands to look at/try on.
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Any recommendations for fitters in the Lancashire area?
The only fitters I trust in the UK are Colin at Solutions4Feet in Bicester or Hamish at Pro-feet in London (although with the way Hamish trains his staff anyone there will be more than competent). I'm sure there are several up North, but I unfortunately I don't know who they might be.