My bad. Didn't realize that. Regardless, your mechanic should be hook for this. I recall someone ordering some rockauto drums assuming they came complete but were bare drums without studs or bearings.
You could try to source some used drums from car-part.com or ebay. I don't know if the ring is the same from 15-17. The drums are different but rings might interchange.
__________________________________________
View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)