Depending on how long the list is, you can use mobile:Find. For extremely large lists you will probably have to write your own method that uses swipes.
Something that determines which direction to swipe (is first visible element > or < you desired element), and then swiping appropriate distances and checking for the value. It will be a little slow regardless, but there are probably a few clever solutions our there.
Personally I store all visible values in a data structure and check if my element exists, if not I scroll an amount that presents me with new elements.