OKI ES9431 - Fuser part replaced (help me)

I have the following problem, I should replace the Fuser Film Sleeve and Pressure Roller.
I searched all over the internet, alibaba, aliexpress etc... I am looking for these 2 components to replace the OKI es9431 (oki c911, c931... similar series). On these sites I find many components but I can't find these two that interest me.
From OKI I find the Fuser Film Sleeve of other printers (OKI B721/B731 MB760/MB770 MPS5501/5502 or the A3+ series c9600 9800 930 910 9650)
I noticed that these OKI components are scarce as spare parts, but I see many spare parts for xerox 240, 250... or kiocera taskalfa, etc..
I was wondering but wouldn't it be possible to put these components for example for kyocera in the components of my oki fuser?
@OkiTech
Please suggest me how to get these spare parts.