I may be able to use the Mould Tool in Xara to deform the displacement map to another shape before turning it into an igs file in Zsurf. Illustrator and Coreldraw probably have similar features. At the end of the day with peripheral embellishments, I could change the shape of a small number of displacement maps into a myriad of totally new displacement maps to fit different shape objects or to create different shape relief igs files in Zsurf.

Example of Xara Mould tool, also using preset envelope to distort one shape or object to another shape.

http://www.xaraxone.com/webxealot/workbook43/page_3.htm