SEARCH button needed in our existing iOS APP

NewLeads has our own App already for iPads and iPhones. Within our App, we can show brochures, literature, PPT, movie clips, … and so on, for our clients to select and electronically fulfill the order when at tradeshows and events. I attached a screenshot (Visual Literature Library) showing different product groups and by clicking on a group, the group opens up and shows individual product items: Imagine that some of our clients have literally hundreds of different product listings in various product groups. Here is the task: Our client want to get a SEARCH button in our literature screen inside our App, where they can search individual literature items: I made up a screen shot showing how the search would work by searching a keyword in a pdf file, for example: Demo Search button for pdf files. As you can see, I searched for the word “Literature” and every item is highlighted on the pdf file! Here are a few questions for you: Can you modify our App and provide us with a “Search” solution for our existing iOS App? What would be the time frame to finish up that project? What would that cost us? Looking forward to hear back from you, Karl