Kei Nishikori UNIQLO Crew Tops - Where can I get them?!

I have been looking all over the place with not much luck for the UNIQLO crew/v-neck tops that Kei Nishikori wears in practice. I got one about 3 years ago from the UNIQLO website but they seem to have stopped selling them. Is there anywhere I can get one of these without paying £20 plus for shipping?! I have attached some examples below.





Thanks! Owen