screen protectors for first generation I phone SE?

Try Amazon: https://www.amazon.com/s?k=screen+protector+for+iphone+se+2016&crid=1B3XD8GKYYASY&sprefix=screen+protector+for+iphone+se+2016%2Caps%2C110&ref=nb_sb_noss_1

iPhone 5c is an antique at this point, so you won't find any accessories for such an old iPhone from Apple. Some of the products I saw on Amazon say they're for iPhone 5C, which likely has the exact same size screen as iPhone 5, so they'd likely work on either. You are dealing with an iPhone released in 2013, 11 years ago. As a vintage iPhone, it no longer qualifies for service support from Apple for anything. Please understand, I'm not trying to be mean. Just honest about such an old device.