Hey Jon, You might try one of the Vendors, Atlantic E-H, 540-298-9310 or
www.superxparts.com They should have a couple in stock. They can guide you in replacing it as well if your gonna do this yourself.
You say your X is Henderson Blue Chameleon? HMMM... Custom paint?
I remember the original Owner and it was G/O out of Baltimore... Free history lesson about your X!
Jumper