I'm after the bespoke 2.4g aerial that came with the DSM2 conversion kit Spektrum sold for the Multiplex 3030/4000 transmitters. It looks very similar to the ones on a DX7/9 set but had a much longer lead to connect to the module.
Included in the kit was also a different style aerial for the Royal Evo sets so I'm hoping if you did that conversion you didn't chuck the 3030 one away.
Cheers.
Shaun.