Any ideas on where Bachmann Spectrum split frame insulators?

I checked the online parts section of the Bachmann website -- no dice, just a bunch of Thomas the Tank Engine parts. (I wish I could find the late Mr. Conductor) :-)

I need an entire insulator set. I installed a Digitrax Decoder tonight and two of the Tee-nuts and one of the center insulators split. One of the plastic engine insulators split as well, abut I managed to make that work ok. This plastic is very brittle and of low quality.

If anyone has any ideas on a retrofit plan, that would be helpful as well.

Thansk!

--Jon