Proper template for UserPickerSearcher

I have created custom field of type UserCFType and searcher for it. Even if I can reuse UserPickerSearcher, I should set path to template to make it work on filter page. Is there a way to reuse template that are used for “Asignee” criteria? Or any other with at least one input field with autocomplete? I tried to create this from scratch, but such many errors occur here and there (possitioning\ filter doesn’t update\others).