Amazon has IQShield Liquidskin Apple Watch Screen Protectors for 38mm/42mm size . Both are $2.35 after applying codes listed below.
[6 Pack] Apple Watch Screen Protector (42mm Series 3/2/1 Compatible), Full Coverage
https://www.amazon.com/dp/B07GK63VK2
Discount Code: HSTA5QOW
Price: $2.35
Shipping is free for Amazon Prime Members
[6 Pack] Apple Watch Screen Protector (38mm Series 3/2/1 Compatible), Full Coverage
https://www.amazon.com/dp/B07483LGRB
Code: HSTA5QOW
Price: $2.35