You can paint your kidneys for <$10, or I have seen them on ebay for around $60. The first set I did, I sanded and painted them on the car. Just take your time masking them out, then sand and paint. The second set I did off the car which is ideal. The car was in the bodyshop for front end repair. Otherwise, I think you would break those pieces removing them
I got blackout tape at Autozone. However, I would consider painting the trim. It really comes out better. At least on that curve at the back window. I don't think there is a way to make that look good with the blackout tape. When I did it, I never liked the way that curve came out, it was kind of "patched together". Eventually it peeled off the curve so I painted that piece.