225/40 zr 18

Hi! Nice to meet you all. This is my first post here, so i hope to do it good! :) I have a 2020 290cv leon cupra, which i use as daily and sometimes i run at trackdays. Now it have 235/35 R19 8J width rims. I found the opportunity to buy a 18" 7.5J alloys from an original cupra (winter pack)...

Im new to all this was reccomended by a friend im looking for and alloy i currently have 4 rubbish ones on my car as they are "15" i have been given 3 by a friend and i am in need of 1 more but carnt find one anywhere please help Where to find one ?? Does anyone have one for sale ?? Pictures...