The Columba's are the only 16" 850 wheel that can clear 302mm - if you grind the caliper shoulders down a bit. You'd have to remove shoulders and shave a couple of mm off the entire top surface to make the Persus fit. As I'm sure you've seen they're quite tight on the standard 280mm ones.

In the UK, decidedly rare.

In the EU Bosch was OE for these parts in petrols. Beru was OE for the diesels.

Rick hit the nail on the head, here's another thread for cross-reference:

viewtopic.php?t=74111

Doesn't matter if plugged or open to be honest.

850R extensions available from here. Well recommended company here in the UK and I know he's had quite a few international (including the USA) customers.

XIX is also the opening song from Slipknot's 5th studio album "The Gray Chapter", but Slipknot use zildjian's range of cymbals (Paiste's back when XIX was released actually) so it doesn't fit as perfectly as one would hope.

You can get away with undoing the rear of the subframe and lowering it slightly. You only need a few extra mm to get sufficient clearance.

@Ocelot, you can do an okay-ish repair by doing the following, but depening on how much of the equipment you already have it may well be cheaper to find a replacement bonnet. - Bilt Hamber Deox-Gel can be applied directly to the rust spot and it will remove the rust. If you can't get that, sand as m...

There is a hidden rust spot on these P80s that I've only just recently been made aware of, thanks to this post on a UK forum - link . It seems this affects a significant number of P80s, but is largerly un-noticed due to its location. Eventually it will result in an MOT failure in the UK as the rust ...

There are lots of posts regarding failsafes for getting hoods open with failures. Have a search, you'll find a good number of options. Hood-pins can be installed on any vehicle though, and the slam panel would be perfect for a mounting location. Or one could easily fab a small bracket from the littl...