How to find discontinued Hunter Douglas parts?

I have Hunter Douglas Luminette Privacy Sheers that were manufactured in 2001 installed on two windows. All Luminette blinds manufactured prior to 2003 have been discontinued, which has been hugely troublesome because I just need one part, the "Universal Bulk Head Body." While I managed to find one site (Blindshaderepair.com) that sells this part (so I thought), it's been nearly three weeks since I placed my order and it has yet to even be marked as shipped. Two emails to customer support and many more voice mails (because they don't ever pick up) has not yielded any success.

I contacted Hunter Douglas about my problem and they responded, "Because the shades are from 2001, most dealers will not have parts to repair the shades, and we would not have a list of different 3rd party shade part websites that carry discontinued components. Due to the age of the shades, the only other option we can suggest is purchasing new ones."

For how expensive these blinds were, I feel it would be rather silly to replace the entire blinds simply because of one inexpensive part. I have also been looking for perhaps knockoff versions of the same part but have not been able to find anything. Any help is appreciated.