That might be a difficult one
https://www.rokit.co.uk/collections/...AmjZJI-2Y9iuVK
I have found a few gems at Rokit in the past but it’s not often
https://www.blightymilitaria.com/en-...071?reset=true
Blighty usually has some good gear.
https://omegamilitaria.com/collections/jackets
Not dealt with them but they have some good looking kit on the website
Whilst not UK based https://www.ebay.com/str/cadencemilitaria
On eBay has lots of gear and seems to churn so worth a look every now and again.