Stock Brake disc options

[GTR_Garner]

Merry Christmas all,
Hope everyone has had a good one!

I had a quick question regarding brake disc size options for XJ40 based kits.

I'm planning on running 15"s and trying to get the biggest brakes I can inside the wheels.
Who on here is running 6/4 pot calipers and what is your setup?

It's slightly confusing as I speak to AK about wanting vented all round and they say they can offer 295 on rear also but I can only find solid rear discs in that size?
I'm trying to keep stock disc sizes for 'simplicity'.

What I've found:

Front:
295mm 1986-89
291mm 1990-94

Rear:
278mm solid 1986-89
295mm solid 1990-94
305mm vented x300

Front brake caliper options I have a bit more play with but rears are more challenging - 305's I think will be too big to get a 4 pot setup on.

Interested to see what you guys have.

Thanks,
Chris