You can buy the covers here
You can find the fronts here: https://www.turtlecovers.co.uk/products/ford-transit-custom-2013-onwards-tailored-front-seat-covers
and the rears here: https://www.turtlecovers.co.uk/products/ford-transit-custom-2013-double-cab-in-van-dciv-tailored-waterproof-rear-3-seater-bench-seat-cover
Looking for seat covers in grey camo for
Ford Transit custom Crew cab 2017 LWB DCIV 4 door model
front and rear seats (6) front has work tray.