The ones I bought are from AliExpress. I'm happy how they worked. I'm putting description s down below.
KEYSION Phone Case for Nokia 7 Plus Carbon Fiber Soft TPU Silicone Brushed Anti-Skid Anti-knock Back Cover for NOKIA 7 Plus
Lamorniea Tempered Glass For Nokia 7 Plus 2.5D Full Cover Screen Protector For Nokia 7 Protective Glass Film For Nokia7 Plus
You must check sellers reputation I've made like 20 purchases there different sellers and no problems. Check Amazon and eBay as well. I don't like flip covers too.. if you drop they tend to open and ...ouch..
My son has just got this phone. And it's the same places on his. Under the headphone jack. Top left and right side just below the corners. Bottom left and right just above the corner's. Bottom left and right. All about 2mm long. Crap looking.