All my local stores have stock available so likely customisation. If not, I'm sure you could go to your local store and pick a pair up.
Me personally, I'm in no rush for a pair so may wait for my next US trip and get a pair there to save the £55 Brexit tax. Definitely over priced here in the UK IMHO.
You might have been better waiting until today to order them. All stores near me have stock and I’ve just picked mine up from Manchester Arndale store and I ordered them at 7am this morning
I also ordered mine with engraving and for in store pickup. Order tracking is still saying that they’ll be available today but they haven’t arrived yet. I’m hoping that there’s a shipment of engraved orders arriving to the store this afternoon!