Ms Edlin took to social media, called scrap metal dealers and notified the police but has had no luck tracking down the donated item.
"It would have made a huge difference, we just want it back," Ms Edlin said. "Do they realise they stole it from a charity?"
Mouats Engineering general manager Neil Miller donated the industrial storage racking, worth between $8000 to $10,000, to the charity.
"It's a scummy thing to do," Mr Miller said. "It's just not right. It makes it even more sad when it's a non-for-profit organisation trying to do good."
President of Tauranga Saint Vincent de Paul Tony Rogers said he was annoyed and disappointed someone would take an item of such a large size from a charity.
"It would have made a real difference by providing valuable storage," Mr Rogers said.
The industrial storage racking would have enabled the charity to store donated items more effectively.
"Our job of helping disadvantaged people in the community has been made that much harder," he said.
Ms Edlin said she did not want any repercussions for the people who took the storage system as long as it was returned.
"Industry racking is horrifyingly expensive, we won't get the opportunity to get it again," she said.
Saint Vincent de Paul believed it would be unable to claim insurance on the item because it was donated.
The New Zealand Insurance Council advised there was not an overall policy on donated goods.