[Closed] Fork Brake Caliper Mounting Question?

Hi there, after a fruitless search I'm sure the fountain of all knowledge that is STW can help me.

I have a 1999 Marzocchi Bomber Z-4 that came on a Rocky Mountain, and I have finally got round to installing disc brakes.

The IS bracket for the Avid J5 front brake seems from my research to be the IS 51 size. However when I offered it up to the fork, the supplied bolts are too fat for the mount, and also too close togethere.

I have measured that gap between the mounting holes, it seems to be 49mm c/c

So the question is what mounting bracket do I need to fit the brake for a 180mm rotor?

Thanks in advance

Alex 😮 )