Welcome to the forum AsiaKid!
I got my springs from Zillion and they did a pretty good job at it. Price was very reasonable too. They can also get you Forgestars if you want. When I asked, the price was also very reasonable. I think even cheaper than Advan. I can refer you if you want.
Or if you can wait for Mlai, he'll probably sell one of the 2 sets he ordered. Both matches your color very well. And they are both forged.
Guys,
As for BMW's promo for the 528i, a friend told me they are giving him sunroof, tailgate, rear cam, and sunblind for $632K. This is to compete with E250 as it will be getting an FRT deduction. I paid $660K before the tax increase and I only have sunroof, sunblinds, soft close doors and anthracite headliner. I really wanted the tailgate function. Sort of pisses me off