Pulley info
 

TMWillis13 has sent me some info for those needing pulleys. He found metal replacements for the pulleys on Amazon. Numbers are Maxpower 7127 and 91178. These are pulleys for lawnmowers but appear to be almost identical to those used in our system. Has 1/2" bore and are 3" diameter. They are about $8.91 or so each. Not a bad find! Thanks quiet friend, and welcome.
Tree

The 3" pulley was too large, mine needed a 2" pulley. But I found one on Amazon that worked perfectly. It was $18.11

Indusco 75700006 Zinc Plated Steel Replacement Sheave with Bronze Bushed, 600 lbs Working Load Limit, 3/16" Cable Size, 2" Diameter x 1/2" Bore https://a.co/d/e6n2Zdq