GreenSpeed Upright Post with Bracket

For Greenspeed trikes, Upright Posts (additional to the steering) are available, sometimes known as Accessory Posts, as they are made for mounting accessories and grab handles. 

These are primarily used for easier entry / exit, best if purchased with Grab Handles, as well as mounting the Mirrycle Mirror (both are pictured here in 3rd pic, but are not included).

Price is for a single post, as often one is enough, unless you also want Front Mudguards