Thank you gentleman for your well thought out responses. Good to know there are some reliable resources that can rebuild your treasured cart with same materials (if available). I did liked your comment about outcome of such rebuild as hybrid design with good results but different. The owner who has spent considerable amount of time with original build is in a position to judge whether rebuild is worth keeping around. This makes it a worthwhile endeavor on high priced carts or those no longer in production.
Welcome to the wonderful world of vinyl playback :-)