This is one of those sets that never made it into production.
Each theme is allowed a certain amount of sets each year and that means some sets are never put into production.
The best stays, meaning that it's a hard calculation between production cost and income.
I would have loved this mini to have gone into production, but luckily we get tho have the instruction on LEGO's cache and we can make it ourselves instead.
Just like the two never released Castle Impulse sets (the ones in the new Brickmaster Book).
Review has been added to the index.