REST Consumer Service Operation - Dynamic URL?

Is there any method to make the Server component of the consumer Rest Base URL dynamic?

I've created a consumer REST service/operation but I can't find a way to override the URL without making two service operations, one for Production and one for nonProduction.  We'd like to have invocations from nonProd environments go somewhere else, not to production servers, and I hate to rely on refresh script update statements for issues like this.

We have used PRIMARY_URL property ID of a Routing Connector Property on an Asynchronous SOAP based webService call before (overriding the URL with database specific parameters), but on a REST based webService, the only Routing Connector properties available are the HEADER properties.