It comes from the manufacturer in Taiwan, made of ABS plastic (nice quality!), and apparently most of them will do it painted for you. This is the seller I got it from, all you do is just give them your color code when you win the auction:
Painted BMW E53 x5 Series A Type Trunk Spoiler 2000 2006
I know you have Alpine White, Sammy, and I will note that 99% of the auctions I found for the pre-painted spoilers make an up front disclaimer that Red and White colors may not be a 100% match.
You can buy the spoiler from sellers in the USA, for $43 shipped, unpainted, and WITHOUT install materials. I was thoroughly pleased with the install materials provided with my pre-painted spoiler.
Considering that most paint shops/body shops charge hourly rate for paint and materials, I could easily see a shop charging a "small job" fee of $100 or more to paint this for you, and to provide you with install materials and/or put it on for you.
As far as the "badge indent" goes, I hate badges, and would rather have the recess shown, than put an ACS badge on the rear. If I bought it unpainted, I would have had the recess filled in and smoothed, then the spoiler painted. But for the cost my wife paid ($97 landed and painted), I'm more than happy to live with the badge recess on my spoiler. It really is not noticeable when you are a few feet away, and since I took the 3 pictures in my garage from the right side I understand it is sort of "glaring at you", but its really not noticeable since the piece is color matched, in my opinion.
Not sure of a body shop estimate, but I could see a shop charging an easy 200 bucks to fill in the badge recess, installation materials and paint time and charges if you bought it unpainted. As you can see, the pre-painted spoiler is a good value (and you can get ACS badge from other sources if you'd like to have that as well)
Good luck Sammy let me know if you have any other questions!
EDIT: Thanks Tiag, your satin black spoiler looks perfect on yours, really ties in the black lower trims and the roof rails, your silver/black theme! I took a gamble on buying it pre-painted but the paint is a dead match, and I love how my spoiler blends in very subtly to the rest of the trunk. Really completes my rear with the Ractive tips, LED tails, and my rear wiper delete
