Bake Booster Vacuum Leak

I have been suspecting my brake booster on the 68 charger has been leaking and causing a miss for a while, i just recently disconnected it all together and it turned out to be the case. Now that i know its a leak how can i go about fixing it? Some on told me it should be the check valve but should i look else where on the unit? Thank you.

The check valve is the only thing you can service so if it's not that then you need to replace the booster.

Hmm okay i kinda figured as much, thanks for the quick reply.