Did you make and headway with this? I would like to do something similar. Have a repeater field in the options panel, then use a shortcode to select which repeater item.
[acf field="field_name" post_id="options" key="key_name"]
depending on the type of the subfield might have to do:
[acf field="field_name" post_id="options" key="key_name" subfield="sub_field_name"]
Found out my problem a few min after posting. Forgot that I was removing the field key when in the PHP creation of the field. Added that in and it worked ok.
