The shop is going to be opened up outside UK soon I understand.
I'm not involved with the shop side I'm afraid but have made it clear it needs to be international.
Having personally transcribed every replacement chain catalogue, I know there are too many individual lengths to stock every single individual length.
The decision was therefore made to sell a length long enough to cover every length for every classic bike since 1900.
Each action adds to the cost & personally, I don't know anyone with a classic bike that doesn't have the tools to split & connect a chain together.
For the primary chains, you get a rivet & spring link to make your own choice as to what you prefer.
I'd also like to make a point of the cranked links many people make a point of. They are available for the new chains but it's always recommended that you try & go for even pitches whenever possible.
Considering it only takes just under 8mm overall wheel adjustment to lose the need for a cranked link on a 5/8" pitch chain, I've yet to have a bike that didn't have enough adjustment.
I'm not saying cranked links are unsafe. I've got one on my Triton for many years but for the new chain, I'm going to be removing it for a single spring link.