Hi,
I used the following website to order front and rear bumpers for my E91 2009 316i Touring (normal bumpers). They were shipped from Germany and the shipping cost was about 467 SEK (about 6000 ISK) door delivery, safely packaged. For smaller spare parts, it usually costs 85 SEK. I have previously ordered spare parts from them and have good experience with their customer care.
https://www.bildelaronline24.se/
They also have a UK website
https://www.buycarparts.co.uk/
I'm not sure which website is the best for you if you live in Iceland. A quick search for your bumpers gave me this result.
https://www.buycarparts.co.uk/bmw/3-...7/bumper-parts.
If you can find out the OEM part number of the bumper you want, you can match it with the aftermarket bumper as they often write the equivalent OEM part number in the parts details.
You can select your car model and it will display a list of available bumpers. I ordered VAN WEZEL Bumper for the front and PRASCO for the rear. Both Van Wezel and PRASCO are European companies (Belgium and Italy I think) and claim the quality is like OEM. The material is PP (Polypropylene), the same material as OEM bumper. The bumpers I ordered, came primed and ready to be painted. I'll get it painted by BMW dealer in a week, and mount it myself. I can tell you the final result if you want to wait.
Hope this helped. If you have more questions I'm glad to help.
Best Regards,
Tenil.