battery box worn out

[wslade2]

My original battery box has been fiberglass repaired multiple times. Is warped, cracked, shabby, leaky. Looking for a replacement or alternative. Any ideas besides continuing to fiberglass up the 50 yr old disintegrating plastic box? I am seeing these Bogert stainless battery boxes for 182's etc. Sure would be nice. A good sealing box with a tight vent would be nice to control local corrosion which is trying to involve the firewall.