3rd Party Drop Ship with Alternative Return Shipping Address on Label

Summary

We are trying to get an alternate return ship to address different from our shipping facility on the UPS shipping label.

Content

We have a new customer that we are looking to perform drop ships with. Unlike current drop ship customers we have, they require their return ship to address to be on the shipping label. Currently all our labels print with the shipping warehouse's address on them. We use UPS integration and UPS' labels that are passed through web services. Our hope was to find a way to configure this without having to use Label Designer to create custom shipping labels which would need to be approved by UPS. Even if this was possible, it wouldn't be ideal. Has anyone out there