You can dye nylon parts yourself - just use a household clothing dye that's suitable for artificial fabrics. Obviously you can only go darker than the current colour - so black should be no problem.
Here's an alternative in design materials, despite it's larger size the one on the right is 40 grams lighter. It has no steel nuts and bolts, flys for 25 mins on a 5000 Ma. battery. Vibration free it has the best stability yet seen anywhere. It can fly in tight areas without risk of damage to anything. View attachment 4048 Carbon Nanotube fibers are the strongest substrate known to man.