We've taken a look to try to find the few places that still sell those remaining precious cans from the days before the big change and we are asking for your help too.
If you spot any of the rare old-recipe Irn-Bru in the wild then let us know in the comments below.
We'll continue to update this article as we find them.
There are a few vendors on the online retail site selling the pre-sugar tax cans including one who is selling packs of 24 for under £30.
Enerzaid, an online start up, is looking to create a new range of classic sparkling Glucose drinks, including one called 'True Brew' based on the drink we know and love.
Some enterprising Scots have taken internet listings site Gumtree to sell their remaining full sugar versions of Scotland's favourite Scottish soft drink.
The discount store is reported to have a large quantity of the 500ml cans of Original Irn-Bru.
B & M are another that are said to have more than a few cases of the old recipe cans and bottles dotted around their stores.
(300 Caledonian Road, ML2 0HY Wishaw)
(34-36 Sinclair Street, PA15 2EY Greenock)
(44-45 St Patrick Square, EH8 9ET Edinburgh)
• READ MORE: Scotland supermarket stockpiles thousands of original Irn-Bru bottles
• READ MORE: 15 things you (probably) didn’t know about Irn-Bru