I have never seen homemmade mayo that is as white as the commercial stuff.....the best mayo is home made, usually, so perhaps try making it your self, its no so hard as people often think....and then decide if you like it better than the stuff you can get commercially. Alternatively where are you? It could be that there are expat food providers who will sell you a jar or too of a US or UK "white" mayonnaise....
Although I never adnit it when serving my own mayonnaise I am a huge helmans fan.....especially the extra light variety for sandwhiches and tuna salads for one or the two of us, it is easier and although I generally avoid "packet" and prepared food, the extra light label is sometimes too tempting to avoid.