cutting discs

Bargain ones in Aldi at the mo, 230mm dry or dry & wet £3.99. 25.4 centre but come with 22.32 reducer

Hello forum....... I am trying to track down some 89mm cutting discs with a bore size of 11.12mm. That is what is says on my well-worn metal-cutting disc, but nowhere on the internet can I find any reference to this bore size. It is for a 'pro' branded multi-tool that I got from B&Q a long time...