1. Sprogs stainless bolts - well worth the investment IMO.
2. Vauxhall Insignia wheel nut covers. The only ones available in 22mm, but all are grey coloured IIRC. Available on ebay generally.
hillengineering.co.uk? Ouch they're a bit pricey but very nice....
Yes, not sure if the ones they list are the correct length, but i'm sure they wouldn't hesitate to get some made the correct length.
Would love some to replace the chrome plated bolts supplied with my Formula Dynamic rims.
Is this my Cue for my bolt **** picture again? Courtesy of sprogs.
The FD ones are complete sh!te, flash coated cr4p and mine lasted two removal cycles before they started rusting.