I don't see any reason why it wouldn't work given the Vfs are the same. I actually tried to do that with mine. I burned out the 1 ohm resistor in my early model by inserting the copper "C" ring backwords. I had to order another LED/PCB from Rob. Having the old PCB/LED, I soldered over the tiny 1 ohm resistor to bypass it and it worked. The LED seemed much dimmer than the replacement so I removed it and attempted to solder in a UX1J emitter removed from a star I bought from Photonfanatic.
I must have bent one of the leads once too many times because it broke off right at the plastic body of the emitter. So - Patient dead before it got off the operating table.
I hope you're a lot more nimble fingered than I am. Oh, I did manage to get a nice second degree burn on my finger from the soldering iron. It's healing nicely...