Parts are available for many, not for special, check and see if so for your drivers.
I first paid a pro to re-cone my vintage 15" woofers. next, I bought a complete coil/cone kit and rebuilt them myself. Hardest part was scraping the old glue off the spider ring.
Next, I replaced just the foam surround ring of a Velodyne 12" driver myself, surprisingly easy.
How handy are you? they have many videos
https://www.simplyspeakers.com/simplyspeakers-youtube.html