Harley Davidson, soft tail seat to fit fat boy, sport glide et cetera from 2018 onwards. Part numbers are visible in photos.
eBay
Driver Passenger Seat Motorcycle 2-Up Black/Blue/White/Red Seat For Harley Softail Fat Boy FLFB FLFBS 18-Up Breakout FXBR 23-Up
Aliexpress UK
Harley-Davidson FXFBS 1868 ABS Softail Fat Bob 114 - 2021. Harley-Davidson FXFBS 1868 ABS Softail Fat Bob 114 2018 - 2020. Made in the U.S.A.
eBay
4Colors Comfortable Two UP Seats Motorcycle Driver Front Rear Passenger Seat For Harley Softail Street Bob Slim Deluxe 2018-2024
Aliexpress UK
For Harley FLSTF 2000-2006. For Harley FLST 2000-2007. For Harley FXST 2000-2005. 1 Pc Solo Seat. Instruction of installation is not included. Color:Black and Black Line. is provided once the item is dispatched.
eBay
Motorcycle Seat Bolt Tab Screw Mount Knob Seat Tab Cover with 1/4-20 thread For Harley Sportster XL Touring FLHR Dyna Softail
Aliexpress UK
Fits '18-later FLDE, FLHC, FLHCS, FLSL, FXBB, FXBBS and FXST models. For Harley Softail Standard (FXST) 2020-2023. For Harley Softail Slim FLSL (FXSL) 2018-2021. For Harley Softail Deluxe (FLDE) 2018-2020.
eBay
Motorcycle Front Driver Rider Seat Diamond Cushion Low Profile Seat For Harley Softail Heritage FLSTC Classic Deluxe FLSTN 06-17
Aliexpress UK
Here I have a used Harley Davidson Softail Slim Reach Solo seat. Will fit a M8 Street Bob, but please do your own research. Harley part No. 52000303
eBay
Driver Passenger Two Up Seat For Harley Softail Low Rider S ST FXLR FXLRS FXLRST Sport Glide FLSB Motorcycle Double Seat 2018-25
Aliexpress UK
Driver Rider Solo Seat For Harley Fat Boy Softail Deuce FXSTD Deluxe FLSTN FXST. For Harley FLST 2000-2007. 1x Solo Seat. For Harley FXST 2000-2005. For Harley FLSTF 2000-2006. The appearance is simple and generous that will Dramatically Improve the Luxury Appearance and comfort for Vehicle.
eBay
Motorcycle Black Pillion Pad Seat Cushion Solo Rear Seat Passenger Saddle For Harley Softail Street Bob FXBB FXST 2018-2022 2023
Aliexpress UK
Specification: Aftermarket 100% brand new Material: PP+Microfiber Leather+Polyurethane foam+Gel Pad. Stitch Color: Gold Weight: 5.8 lbs OEM Part Number: 52000300 Fitment: Fits '18-later FLDE, FLHC, FLHCS, FLSL, FXBB, FXBBS and FXST models. FLDE, FLSL, and FXBB models require separate purchase of Passenger Footpegs and Passenger Footpeg Mounting Kit P/N 50500769 or 50500771. For Harley Softail Street Bob (FXBB ) 2018-2020 For Harley Softail Street Bob 114 (FXBBS ) 2021-2024 For Harley Softail Slim FLSL (FXSL) 2018-2021 For Harley Softail Standard (FXST) 2020-2024 For Harley Softail Deluxe (FLDE) 2018-2020 For Harley Softail Heritage Classic (FLHC) 2018-2022 For Harley Softail Heritage Classic 114 (FLHCS) 2018-2024 Package Included: 1 pc 2-Up Seat.
eBay
Motorcycle Driver Solo Seat Front Cushion Diamond Low Profile Seat For Harley Softail Fatboy Breakout FXBRS FXBR FLSTF 2018-2024
Aliexpress UK
Fits '18-later FLDE, FLHC, FLHCS, FLSL, FXBB, FXBBS and FXST models. For Harley Softail Standard (FXST) 2020-2024. For Harley Softail Slim FLSL (FXSL) 2018-2021. For Harley Softail Deluxe (FLDE) 2018-2020.
eBay
Motorcycle Mount Seat Bolt Pad Washer Part Rear Fender Mounting Seat Rubber Gasket For Harley CVO Softail Dyna Sportster Touring
Aliexpress UK