Illustrator Script for Find and Replace

I'm looking for someone to create a script that can be added to Adobe Illustrator to automate a 'find and replace' function across multiple files. The aim is to replace specific symbols, shapes and graphics based on defined attributes... (Budget: £250 - £750 GBP, Jobs: Adobe Creative Cloud, Adobe Creative Suite, Adobe Flash, Adobe Illustrator, Automation, Cartography & Maps, Illustrator, Scripting)