Looking at the New Holland online parts book for the 445A:
New Holland Construction | 445A - 3 Cyl Tractor Loader | MyCNH US Store Look in the second row, first exploded view on the left side. Select it and it will open to a larger view, along with a list of parts and part numbers. I copied and pasted the PN's to Google.
There is a company called
AVSPARE.COM that buys up a lot of NOS parts from closing dealerships, etc. They have both parts listed, but you have to check to see if it is in stock and for price. I've never dealt with them personally, and don't know anyone who has. So, I guess you can try.
New Holland lists it as a bearing cover so I assume the bearing and cover are one piece. Here is a link to it:
BEARING COVER,18.92 mm ID x 38.86 mm OD x 12 mm D6NN3C687A - New.Holland | AVSpare.com
Here is the one for the seal:
FELT SEAL D8NN3N898AA - New.Holland | AVSpare.com
The seal seems to be more common and available through many aftermarket vendors. Just use the OEM part number
D8NN3N898AA
to look for it.