I need to replace my fuse block

The front side of the 30 amp main is overheating and melting the strip inside.
I've gone through the harness as best I can and can't find any shorts.

Should I just get one from ebay?

Or would a newer blade type one be better ? If they are where would I find one that fits?

I have used a 4 circuit, blade type I fuse box and use the extra circuit spot for the “coil relay mod”

double win

I installed a 30 amp blade type and use the stock for lighting and such. It opened a slot for more low power circuits.
Steve