AP racing front disk replacement

[MisterCorn]

I am changing the pads on the front of my car, it is fitted with a 6 piston AP racing setup which so far as I can tell the disks were originally 32mm thickness. They are now measuring at just over 30mm. I can't find a spec for the disks which is the first issue.

Assuming that they are ready for changing, I think the part numbers are

CP7177-110G8
CP7177-111G8

But I am also seeing references to part numbers

CP3581-536G8
CP3581-537G8

As I haven't changed these before I have a couple of questions...

Does anybody know the wear limit on these?
How do I tell which disk is the correct one?
Where is a good place to buy them?
Is the disk mounting hardware routinely changed with the disks?

Thanks for any pointers.
MC

[adem.csl]

Trackm3 Martin at racebitz would know these specific info items

[Trawler]

My disks are

Discs CP3581-536G8 & CP3581-537G8

[MisterCorn]

Thanks guys. I should have new disks and bolts on Monday

MC

[Pip1968]

Isn't the wear limit written on the edge of the disc? Obviously diffiicult to see once the disc is worn. I am pretty sure it is written on the OEM discs.

Pip

[MisterCorn]

Isn't the wear limit written on the edge of the disc? Obviously diffiicult to see once the disc is worn. I am pretty sure it is written on the OEM discs.

Pip

I had a good look but didn't see it. I did read online a figure of 30.5mm so they are ready or close enough. Since I'm doing the pads I would rather not risk it if I'm in any doubt.

MC