Its not hard to tint the tails, ive done it on 5 cars.
Super simple, there are millions of DIY out there and they all work...
To summarize:
Take them off, sand with wet sandpaper (1500-2000 grit), clean, spray VHT nightshades, spray clearcoat, buff.
Fin.
I'll post up some pics for you to see. It looks boss as fcuk