Bought a mahogany table and 4 chairs at an estate sale last year. They're all about 12 years old from what I can find and the covering fabric/material on the cushions is coming off.

Is it possible to match this material and reupholster myself, or is there another better/easier option?

TL;DR I need advice on the easiest / best way to replace the cushions on these vintage dining room chairs because they have no seat pad and the last person to reupholster them did a weird job.

Context: I recently bought vintage dining room chairs from a secondhand furniture store. The seats were badly sagging, so I thought I would DIY the cushion replacement because the internet said it was a relatively easy DIY project.

I started by removing the dust cover at the bottom of the chair and quickly realized this wasn’t going to be easy at all. Instead of finding a seat pad that was screwed into the bottom, I found crumbling jute webbing, a burlap layer, and orange cushion foam. The jute was completely deteriorated and torn, i.e. there was no hope of just restretching and reattaching it to restore the support.

After fully removing the dust cover, the fabric, and all the old jute and padding, I realized that the chair might be close to a hundred years old and that I am not the first person to reupholster this chair. I can see that there are bars/screw holes for a where cushion pad would have been screwed in (see pics). But the previous person to reupholster this has Jerry-rigged it instead of using the more standard cushion pad that I see on all the DIY blogs and videos. They nailed a wood bar along the back side of the seat to serve as an anchor for the jute and then wrapped the jute, batting, and fabric all around the outside frame. The outside edge of the frame is all damaged and pock marked from staples and nails. But I can see that there are remnants of a white canvas-like fabric that was nailed to the outside frame before the jute webbing was put in. So I’m guessing that was from the original upholstery, and maybe the frame never was exposed.

So what are my options here? I thought I would just be able to unscrew the seat pad, swap out the cushion, replace the fabric, and then put it all back in. Should I get a new wood pad, screw that into the chair, and then wrap the fabric around the outside frame? Should I recreate the previous reupholsterer’s method? Or should I put a cushion and fabric on a wood seat pad, screw that in, and then try to make the outside edge look pretty with epoxy and wood polish so that it looks “presentable”?

Any help would be appreciated, definitely feel like I bit off more than I can chew as a first timer.