could mount something in the grill area? or roof rack
Bulbs are about 5-7 years max, they start blue shifting and dim until failure. Bowls will be much harder to check, basically have to split the housing and take the projector apart, unless you have some fancy fibre optic camera. Not worth doing unless you notice the light barely visible.
Just grab an Osram/Philips bulb from here https://www.powerbulbs.com/au/store/category/xenon-hid-bulbs-d2s-d2r-d1s-d1r/fitting/d2s-85122
Cool Blue Boost is for that 6000K LED look, other wise any of the others will be better than old OEM ones. I found Cool Blue Intense to be the right amount of blue for that 'modern' look without compromising too much on usable light. Otherwise, Philips vision (standard replacement) works great (I'm still rocking those in my first HID retrofit in my R32).