You can suppress the display of any particular radiobutton with CSS, as they all have unique id's assigned by Zen Cart. For example, for your Quainton 1st January (25-45):
Code:
input#attrib-2-4, input#attrib-2-4+label {display: none;}
The labels are all assigned the same class, but you can address a particular label by combining it with the input ahead of it (input#attrib-2-4+label). Class name not even needed here!
I believe you will find that all instances of this particular radiobutton will now be suppressed, as the id is based on the option name and value.