Frost Mirriam and Bervez Juice drop only in crafting writs and from provisioning hirelings. You can buy them in guild stores too
Hakeijo runes can only be bought via Tel Var stores in Imperial City (DLC). You can buy them in guild stores too and they sell around 10,000 gold. You’ll need to be good in PVP to earn thousands of the stones. UPDATE: They have a chance to drop in Psijic Portals too (requires Summerset & Psijic skill line unlocked)
If you need to learn the Hakeijo and Kuta runes, you should craft something useful “Truly Superb” item out of them rather that some low level rune. You can sell the glyphs at the guild store
Perfect Roe, which is usually used to make XP potions, can only be gotten via filleting raw fish which you get via fishing. The probability is like 1 roe for every 100 fish but it varies widely