Using the Heavy-Duty Fixed Belt Clip (sku 300) from theclip.com I have now attached a new clip to my Clip+.
To make it fit, I did some clearancing of both the back of the Clip+ and the new clip with a dremel tool.
I added more information to the attached photograph.
I used the glue tape sold by theclip.com to affix the clip the the back of the Clip+. End result:
Hope this helps someone.
e_identity.