Looking for OK vacuum brush parts

[eureka-newbie84]

Hello all-

I am brand new to the fascinating world of antique vacuum cleaners. Looking to find a brush assembly for a 20s O.K. Vacuum Brush. Not sure where to even start. Big thanks in advance!!!

 

[hoover300]

Pics? They made at least 2 different sizes of heads for these.

 

[hoover300]

Is it closer to the model A:
https://www.ebay.com/itm/ANTIQUE-11...009495?hash=item35c1855d17:g:YQ8AAMXQskFRHoh3

Or the model B(note the wider head on the B)
https://www.etsy.com/listing/836266...uum&ref=sr_gallery-1-8&organic_search_click=1