I have tried to locate some round ceramic diodes like the ones used on the NTI boards, but I haven't been able to. Any tips? What is the package called?
Typical.. a few minutes after posting this, I found that Vishay BYT56A and SF5400 looks very similar. They have a SOD-64 package and are rated at 3Amp 50V (same as IN4001 and MR500). They are glass encapsulated.