For Sale: Tacx Antares Rollers

I have these, very solid feeling for the price, and you can upgrade them with an added fricton unit, and a front hub holder (both on my wish list). Which would turn them into kind of a basic turbotrainer as well as rollers.

I bought mine some time ago from ribble for £92 - new - now price went to £109. ...
Where can you get these hub holder from? It would be easier to use with it... I have to admit it is pretty challenging to me to do session ...