Non-magical healing can be had with the alchemical Healing Salve from Lords of Darkness. Oddly, Craft (alchemy) doesn't actually require spellcasting... but every alchemy item in the table under the craft skill description that can be made with alchemy has the footnote "1" that requires spellcasting to make those items. (RAW vs RAI) I hate spending money for healing though...
In the Special: section of the Craft skill description it says:
"To make an item using Craft (alchemy), you must have alchemical
equipment and be a spellcaster." PHB. Pg 71. Right hand column, top of page.
So, you do by both text and table, require Spellcasting to be able use the skill. So in a no magic campaign Craft (Alchemy) is pretty much useless.