SPectrum IA (WE2400) Tremolo Bar

I have just purchased a 1989 Spectrum IA (WE2400) guitar.  It has a chrome Bendmaster FT Tremo.  The end on the bar is missing.  It has small threads on it for a piece that apparently was lost.  The below photo shows the item which goes on the end of the bar.  If anyone knows where to find the piece my metal head son would be greatly appreciated.  Help.  Scott

There's no original replacement.

But have a look here and if you need one give me a yell...

http://www.westoneguitars.net/fixme/hardware-repairs/bendmaster-ft-tremolo-collar-insert-replacement/