G'day Norm,
If you can't find any weights thrown out ,the tip shops should have some or they are only around $13. each new.
This year must be a bad year for mower shops as I've seen 2 that closed that had been running since the sixties.
Facebook marketplace has a Honda GXV 160 motor for $30. and a Victa 24 for $90. but no blade plate.
Cheers
Max.