Any recommendations of a company to do this in BSC?

Most of us with short EZ runs DIY, perhaps buying a special or longer brush than SOP
Most pro advisers are not on the HVAC duct cleaning band wagon but to those that provide that service I would put that question, esp. if you got stuck with on-the-roof draftsman's dryer vent solution.

In that vein, most HVAC outfits do this.
Long time friend & Pro HVAC Ed Wren, Climate Masters/Doctors is now Barkers, equally top drawer, so to them I send you. They/other offer an annual service contract that might cover many other items, perhaps a discount on this service as well? Please let us all know the best deal you found.