Yea it sucks having spinal injuries, changing the bike isn't really an option for me as it holds alot of sentimental value.
I have been looking at 2 different seats that have caught my eye.
Midrider: ultimate seats, link removed as per request
Mustang: https://www.mustangseats.com/products/5620/wide-touring-for-yamaha-v-star-1300-1300-tourer-2007-17