B-Tree Implementation using C++

during the last few days I've been working in a problem with a Data-Structures approach. The project itself demands a B-Tree for indexation of users with certain id's. I need to get this project done quickly. Are there any references for C++ full object-oriented B-trees that you could refer me to? (The client was very demanding onto the Object-oriented section, which means we can't use Vectors or native c++ structures)