You'd probably be looking for something like this. To be honest, I have no idea if it would fit a sanke, but it is 21.5" wide. Your best bet would be to go to the store with a tape measure to make sure the inner dimensions work for you. Height wouldn't matter since you'd be putting a collar on it. $159 isn't a bad price if the sanke fits. The first thing I thought of was an old used fridge off craigslist for cheap, but that probably wouldn't fit your width requirement. GL!