Dualsense R2/L2 flex, where to buy?

Hello guys, im new to the forum! hope everyone is having a good day.

well the thing is i need to repair this dualsense because my cousing opened it up because he was feeling sticky the square button and in the process he ripped off this flex.

h ttps://i.gyazo.com/1708685ca57388f10cf46938b438df68.png
(sorry i couldnt add the image or link media on this post so i put it like that)

if you guys can tell where i can buy one it would be nice. thanks in advance.

ps.
i found one on ebay but im not sure if its the right one but kinda pricy (25 bucks)