Is there a way to create a purchase requisition for an outside processing item?

Summary:

Is there a way to create a purchase requisition for an outside processing item?

When I search for items on the screen, no results are found.

Also, is it possible to do this using a web service?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):