Fujifilm lens accessories (S602z)

[voxmagna]

Hello, I have the Fuji 0.79X wide angle lens and extension for my 602. I want to use a hood/ UV filters but I've measured the front outer ring and found it is 70mm. Since the lens comes with a front push fit cap, am I looking at push on accessories?.

This seems a non-standard size. Is this a Fuji thing to get you to buy their accessories(which aren't available). Is this a lathe/turning job, or am I missing something like a converter ring to change the size to 72mm when I can use Hoya accessories. Help please