hmmm wonder why errrr because at £79 nobody will bite try £40 or be left with unsold units numptys 
really not my forte I'm afraid does anyone fancy making me somesrhutch said:There is a how to on here to make your own with a 3D printer. Much cheaper and more leds from memory.
Found it
https://z4-forum.com/forum/viewtopic.php?f=2&t=102287&hilit=Indicators