Epic Weapons are (or should) in fact available to be crafted in the event week of the Kingdom they’re tied to!
However there was a list of exceptions to this posted here:
Prey Seeker and Nature’s Wrath were both on this list, and should otherwise be available for purchase randomly through the weekly “We’ve noticed you’re missing this weapon from your collection!” offer or during a Dragon’s Claw/Glacial Peaks weekly event in this section of the Shop:
(AUD)
The ‘elemental’ swords/staves should all be available in their respective event weeks – if they weren’t, definitely bring it up.
There were a few other Epic Weapons that weren’t on that list, but not heaps.
I wasn’t a huge fan of the choice they made in this regard.