Cup holder

[PinkDaydreams]

Evening all!
I’ve already been helped on here today so thought I’d ask another question
I’ve just purchased a silver cross pop stroller. I am wanting a cup holder to go on it but they don’t make them specifically. What shops can I go into to buy a universal cup holder from please? So far I can only think of boots! Has to be a shop I can go into as the munchkin 360 cup toddler uses is quite wide.
Thanks all!

I also want to put my thermal mug in it too

I’ve found these two on amazon that I like the idea of as the mesh pocket would come in handy to put my keys in when I want to just go for a stroll to the park and not have to take anything.
These are taking weeks to arrive from abroad though and I’m struggling to find anything similar in this country. Please help!

Pics attached now

Mothercare own, Amazon (get/try/return)

Bumping in case anyone knows where I can buy the above pictures from please?! From a shop I can go into preferably.