Hi there, there are other spektrum rx's that are compatible with the DX3e
Compatible Spektrum Receivers
The DX3E is compatible with the following receivers.
Note: The DX3E operates in 16.5ms frame rate.
DSMSR300 - 3-channel Sport - SPMSR300
SR3001 - 3-channel Pro - SPM1205
SR3300T - 3-channel with built-in telemetry -SPMSR3300T
SR3500 - 3-channel Micro Race - SPM1210
Note: The SR3000HRS (SPM1202) receiver is designed to be used with Spektrum’s Futaba HRS compatible module system only and is not compatible with the DX3E.
DSM2SR3100 - 3-channel Pro - SPMSR3100
SR3520 - 3-channel Micro Pro - SPMSR3520
MarineMR3000 - 3-channel Marine - SPMMR3000
(not sure if that's what you meant tho)
Cheers
matt