How to handle Billable Customer scenario in iExpenses module

 Hi folks,

We have following scenario. Employee will spend money from his pocket, later on few Expenses need to collect from Customer rather than our organization.

Ex:- Our company is  XYZ , and we are  using iExpenses module,  we send one consultant for outsourcing to "ABC Company". Transporation, Accomidation allowences need to collect from "ABC Company" other Air ticket and all need to collect from XYZ. 

Note:- Dont say Payroll will handle this, or Create AR invoice and receipt or Miscellanious receipt for the same account . we want direct integration from iExpenses to AR module.