Just forget about the whole fusable link thing altogether. Go to the junk yard and find any 2nd gen, take out the fuse block and mounting bracket in the engine bay and install it in your FB. Then you can go to any auto store and get replacement fuses--and you'll have a few spare slots for stuff like electric fans.
It is really an easy mod. Hardest part is drilling one hole in your strut tower to mount the fuse block. The other hole I used was one of the existing holes that had a nut already welded into it.
Here's what mine looked like before the T2 swap.
Do a search there's much info out there on this mod.
If you can't figure out the ratings let me know and I'll help you out--but I'm sure the info is out there.
p.s. I very seriously doubt the 1.25 sq is 30 amps, I would think at least 60 amps. There is some wiggle room in the amp ratings. The fuses are there to protect the wires and nothing else. So you could tie the fuse rating to the wire gauge. If I remember it looked like Mazda had two of the ratings switched. I'll look for the info and get back.