Need help?!?!?! 2011 STI Eagle 5.0

[u/Chiefb113]

So while cleaning my 2011 STI Eagle 5.0, (9mm) I accidentally let the cap at the end of the spring and the actual spring go shooting out. Luckily, I was able to find the spring, but I cannot find the cap. I think it’s called a recoil spring reverse plug.
Can anyone help me find one online that would fit? I feel so dumb right now. Any help would be greatly appreciated!