capture credit card purchases as Cost to WIP job

Hi

We have the below scenario and would like to understand how this can be handled with in R12.1.3 Depot repair/WIP

Repair and Return scenario of Truck repair(not sold by the company).Any manufacturers custom built truck  comes in for repair-which is similiar to small car repair workshop servicing all makes like ford,toyota,honda,VW ,Audi etc

1.Create an SR,RO
2.Defaults with 2 Logistics lines ie RMA and Ship lines.
3.Receive the RMA line.
4.Create a WIP job with routings having 2 operations ie 10.Workshop ,20-Outside processing.

Workshop does not stock the spare parts(as we dont know which part would be required by customer,as the truck was custom built by different manufacturers) and technician goes to market and procure the part and pay by Credit card and use it in the repair.