If I understand your needs correctly, “disabling” some of the list items is the same as filtering them out: they would not show up in the repeater list. So all you would need to do is apply filters as needed to “disable” items.
Here is an updated .rp file demonstrating this:
Axure repeater question .rp (211.9 KB)
The main change required is unchecking the “Remove other filters” checkbox in the Add Filter action of your “Search Input” widget. Then, you can combine filters: one or more “disabling” filters and the “search text filter” (whatever user enters in the Search Input field.) To demonstrate this, I added a few test buttons to apply filters for anything containing “New”, anything containing “2”, and a button to “enable all items” (which just removes all filters.)
I apply filters using this expression, for example, to filter out all items containing “New”:
[[Item.ProductName.indexOf(‘New’) < ‘0’]]
If you want to filter “in” all items containing “New” (in other words, only “enable” these items) then the expression would be:
[[Item.ProductName.indexOf(‘New’) >= ‘0’]]