BLF TE (Maxtoch) possible led upgrade

So… way back when I got one of the BLF TE Maxtoch M24 I think.
I upgraded it to a XM-L2 U4 1A completely dedomed (well nothing on it at all), and it is lovely, but I wonder is there something with more oomph available now that would fit right in with the current driver?
The original thread is LINK has 2 cells in series.
Maybe an Osram Osram KW CSLPM1.TG as in the shooter 2x?