New Honda 600 owner. Need some parts!!

[Michael Contour]

Hello folks.  I just acquireds my 2nd Honda 600.  I had a yellow coupe in the late 70's, and now I have a yellow 1972 sedan.
Anyway, I could use a few parts and would appreciate any pointers to a supplier.
- Beltline weather stripping for both doors.
- Door and rear hatch lock and key combos.  The locks cylinders are frozen and the key will only go in part way.
- Brackets to hold/mount the rear seat back.  The previous owner re-did the seat covers but did a way with all the brackets.  The seat back is just sitting in there.
Many thanks in advance for any help you can provide.
-Michael