Secondaries are nearly impossible to come by, such as crushed birdsnest for sara brews.. etc,
Would it be a bad idea to add a secondary shop? or would it make ironman mode to EZ?
I just checked the highscores for ironmen herblore, there are 30+ users who have hit 99. Surely things can't be that bad that you feel its a requirement to have an easier system in place? If you really need buyables, maybe ironman isn't the game-mode for you.