Cartridges? I think so... they are used typically at temperatures between 300 to 400 Celsius; and their innards are metal and ceramic. With a properly shaped tip (i.e, large like a chisel or hoof shape, not a tiny pointed tip), I think there should be enough thermal conductivity to get the heat from the heater element to the wood.Do you think the T12 cartridges can handle 240 to 300 watts.
One way to find out, though... get one and try it. Hmm...
Perhaps a post-post-processor? Some script written in your favorite language should be able to pattern match the Z moves, and insert whatever code is needed.I did get the Vectric post processor tuned as well as it could be as they don't have a lot of capability.
There's a whole bunch of them on Amazon, eBay, etc... just search for "ceramic terminal block".Also, Altech makes ceramic terminal blocks.