Steering rack help,

I've recently fitted a steering rack on my caddy and there was a plastic thing inside the rack at the top
Where the wheel would sit, I presume it was to stop the steering wheel from moving, however I lost it , does anyone know what it's called ? I'm trying to source one and have had no Luck  because I have no idea what's it called 
Thanks again 

I don't understand, where the wheel fits, do you mean rack or column.

It’s wjere the steering wheel attached there is lots of play, I remember there being a plastic bush that goes inside the column to stop it rattling around when the wheel is attached If that makes sense, 
Thanks in

https://www.classic-vw.co.uk/mk1-golf-steering-tube-spacer-171419549-4045-p.asp

Could also be the white lower bearing out the bottom.
I know on my Green Cabby it fell down, and I pushed it back in place, then wire-tied it in place with a wide white tie.
Been that way for about 6 years so I considered it a permanent fix.



 

Thanks guys I'll look in to it, all I know is my steering wheel moves like a b—ger and I knew there was a plastic umbrella like type of thing on there and now there's not, I'll try anything thanks again for all your help ! 
Cheers 
Kris