simple RS485 to microcontroller simple schematic required

Need somebody to generate an Eagle .sch file that contains RS485 tranciever (with necessary internal bias resistors to cater for 32 nodes). Half duplex comms. 32 nodes max upto 1M. Provide adequate isolation from external voltage/current surges. Only people that know what they are doing should bid. With the right person involved, it should only take less than 1 hour to design. I need this to port into an existing design of mine. see green boxes in attached diagram for your responsibility