Air manifold unions V8 3.9 (2002)

Ok, so am attempting to remove the air manifold unions and remove the air manifold as i'm repairing rocker cover gaskets and valley gaskets.

I've measured the diameter of the nut and it's 27mm, the problem is that getting a spanner of that size will be a challenge. I've looked online and apparently you can buy something called a "claw spanner" or something like that, but they're £50

Just wandering if there's anything else out there ?

Cheers :clap2:

Has to be open faced to manouvere around air manifold.

1 1/16" would be the closest imperial measurement @ 26.99mm.
So if you could source one of those and caress the jaws with a small disk on a dremmel you'd have your 27mm spanner?