New but not new and centre caps again!

Hi! We have had a 16 plate monte carlo 1.2tsi since new, the finance ended first week into lock down and the car has been sat ever since. Weve been sharing my VRS since then and had planned to get a lease of some description once the fabia had gone (was due to go tomorrow!). However, with all the messing round with VWFS we can't get a car we want unless its a factory order so we needed another car in the meantime. Instead of buying someone else's problems I just bought my own instead, and I now own the little fabia for now. Its a great little car and we were sad for it to be going so the reprieve feels OK. Its only got 26k on it and its in top condition so I'm hopeful I won't lose out. Anyway, I'm waffling. 

Since its mine ot got the full cleaning treatment yesterday which brings me onto the centre caps. They were due to be replaced under warranty before our local dealer went bust and they are in a sorry state. I had 3 sets on my last VRS alone, the current ones are at 18 months and are somehow fine. Anyway the montes caps are absolutely beat and let the car down big style. I've seen people buy non oem replacements and them not fot over on the octavia forums so I wanted to check if anyone has a recommendation of where to get a set from in the correct size? I'm also looking for a gloss black boot/bumper protector for it, its a hatchback variant.

Any help gratefully received!!