I'm looking to replace my battery on my XPS 17 9700. I am based in the UK. I can not find it listed on the Dell UK website. Where are others getting them from in the UK?

Its quite urgent as my battery wear level is down to 76% i.e full charge capacity is down to 22549 mWh down from 95065 mWh as reported in HWinfo

I would like a genuine Dell battery as recommended by Dell:- https://www.dell.com/support/kbdoc/en-uk/000175212/dell-laptop-battery-frequently-asked-questions