So my options are buy a used head for parts or get a new head unless it is still under warranty and covered....
You can buy the part cleaner head for that model as well sans the soleplate and brush roll. It is the ERP one you want, same as ERP versions on the DC40, 41 and 55.
If you email the shop with a link to this topic, we probably have the parts you want used at reasonable money. I’d check but I’m out of town at the moment.