double din HUs are quite expensive, if you buy a single, you can also buy a single din pocket replacement which clicks in place, thats only about £15
as for the bulbs, if you want to change the colour, you can buy bulb paint, but you need to change the brushes everytime, as the paint is really strong and knackers every brush by making it go hard and unusable
or you could just use your gf/wife/mom/nan's nail varnish, already comes with a brush and doesnt the treat, but if you use a light red and not enough, its shines pink, lol this was the quick fix for my show car