Dude, you have gone about it in completely the wrong way.
You can get Paewang boards in the UK for around the £30 price. They are marketed as Datel ArcadePro sticks in the West and cost a fraction of the price.
As for your other needs, I currently sell a large selection of custom PCB’s in the UK and will be selling the brand new PS360+ untis. A much larger and up to date selection than Gremlins. Also carry new joysticks, buttons, and other modding accessories. I am gunning for that company because they currently enjoy a monopoly on the UK market so they can get away with charging very high prices. Once my own business becomes official then at the very least it will force Gremlins to lower their prices to compete.
My own experience has been the opposite when ordering from China, Japan, US, and Thailand. Even with shipping costs, when ordered in bulk there has been a significant lower price than if going by Gremlins alone.