[UK, London] Brackets for Ikea furniture

Need some of these brackets printed for attacking Ikea pegboards to bookshelves. Needs to be relatively sturdy material/settings since they will be holding up a few kilos of tools, but it looks chunky enough and people have posted it working, so I assume nothing too crazy.

Need 4 of them minimum, but let's go for 6 or 8 if it's not too much effort in case I mess up. Black, white, or clear.

https://makerworld.com/en/models/595488-ikea-skadis-pegboard-mount-for-billy-bookshelves#profileId-517405

Based in London, could pick up within the city, or pay for postage within the UK.