

and checking my filter bowl innards, which look like

All seems to be complete with the following parts, from left to right (bottom to top on the tractor):
Central bolt head at bottom
Conical rubber washer (below the bowl)
Bowl
Conical spring, broad end next to bowl
Metal washer
Felt washer, (which fits into the bottom of the Top Hat washer)
Top Hat washer (metal)
Rubber washer (fits into grove on upper side of top hat washer)
Filter cartidge
Looking at the underside of the filter head, there are two rubber washers, one large diameter around the perimeter, one smaller the same as the washer in the top hat.
Pretty sure my rubber washers are all original 52yrs old, and hard as hobs.
Q: where can I get replacement rubber washers, particularly the conical washer at the bottom, and the top hat washer?
Or do I make my own?
Or naughty thought, replace the whole lot with a Spin-on Filter?

TIA