I was going to buy some when I bought my Crystals. Ordered them from uhm where was it now, Volksbits, yeah thats it.
Spoke to the Guy on the phone and asked about Halo/Angel Eyes, he mentioned that the insides of the lamp, the segmented circle that lights up, sometimes cracks off and your left with a gap which looks pants when lit up!
In the end I went for crystal lamps. Safer option. If the lamps are E marked then yes they are UK legal thus will pass an MOT. Volksbits as said above also sell the eyes!
I do agree with you though, they'd look absolutely stunning on a MKII.

G0ldy