I would like to make use of the midi-dmx functionality to control the dimmer and frequency channels of a new strobe toy

Unfortunately it is currently patched at channels 34 and 35, but the midi to dmx only goes up to channel 19.
I currently have other kit, and a LOT of programming on fixtures that are taking up all of the channels midi-dmx works with.
I guess my question is :
a) is there any way to use midi-dmx with channels higher than 19?
or
b) Is there some way I can move some fixtures around without completely having to re-create all of the sequences and programming I have already done.
Any ideas would be very much appreciated!
Ben