It doesn't work that way. The IR LEDs are optimized for a particular wavelength. A 730nm illuminator would only generate a small amount of infrared light at 850nm. So it would be a $300 gamble on my part.That certainly is a possibility for the shutter speeds we run?
I wonder if Axton could produce it but also have filters one could put over for various nm so if it doesn't work in the 730 range you could add a filter to make it 850 and use for another camera?