If anybody has one, it may well be John Bell and Croyden http://johnbellcroyden.co.uk/ in Wigmore Street just east of Marylebone Street on the corner of Wellbeck Street.
They are really nice folks and have a comprehensive selection. Not the cheapest place around but great and good value.
Don't be put off by their barely existent webpage. Give them a call and save a walk, or just go for the ambience.
If you go this evening be aware that the Regent Street lights are being switched on tonight so it may be a little busy near there - you are only 4 streets from Regent Street.
How are you doing these days, burnout-wise?