I need one hour (max) of web research to find a specific gift box

I would like someone to assist me with some web based research, as follows:

I need to source a gift box (made of card) for use when I sell my art works. The ideal gift box that I am looking for is 21cm x 21cm x 3cm. There is a tiny amount of leeway on the size of the box, but it cannot be smaller than 20.5cm x 20.cm x 2.5cm. I do not mind what the colour the gift box is, but I am not a big fan of the "natural" gift boxes, so I'd rather it wasn't that. Preferred colours would be black, white, blue, pink or purple (but as mentioned, I don't really mind). I would also like the box to be sturdy (similar to the examples attached).

I would like someone to spend up to one hour (max) carrying out this task. The main requirement is that the box is as described above (or as near as possible), and can be ordered online from a company based in the UK.

Ideally, you would find three or four different companies, so that I can compare prices, but please do not spend more than one hour on this.

What I would require from you is the name and website address of the company/companies, and confirmation that they stock a gift box as I have described. That is all.

I have attached a few examples of the sort of thing I am looking for (unfortunately none of these are the right size!). If you have any questions please let me know.

Thank you :)