Max e-170 multiport bulkhead

[ddaddy2420]

I’ve recently come into possession of a max e-170 tank. I can’t seem to stop the bulkheads from leaking even though they’ve never been used. So I’m thinking of just removing them and installing regular bulkheads and then sealing them off underneath. I want to use the AIO feature. So my options are
1. Replace the entire multiport bulkhead
2. Removing it and installing just regular bulkheads

anyone got any suggestions? If #2 what size are the holes so I can know what bulkheads to install? If #1 where can I get the multiport bulkhead replacement?