Custom Board Desing

We need to make a custom board design using rabbit rcm4000 core modules (RCM4300, RCM4400W, RCM4510W). The core modules must be able to drive some digital i/o and some serial port (ttl,232,485). Power connection 12-24 v(ac/dc). We need the electrical schemas, and the board layout (2 layer max). Ability to produce prototypes or small production quantity can be appreciated but is out of the scope of this bid.