It seems you're looking for a download or source for Sun Haven version v1.51 (often written as v151).
High-quality mods that thrive on v1.5.1 include: sun haven v151 high quality
Sell prices for forageables and Withergate fish were adjusted, and permanent mana gains from certain consumables were nerfed to prevent early-game over-scaling. It seems you're looking for a download or