While some loose parts are still available, many have been long discontinued. Your best best is to figure out which exact pieces you need, and try using Google to ferret out those parts. While most dealer's will show the number online, it will turn up as "Not Available" but you might get lucky and find some older shop(s) that still have some old parts.
So far that is what I have found, fabric is available but the frame is long discontinued.
The exploded parts list is very helpful, thank you. I may try to build my own frame as
the mower runs good and I got it cheap enough.