Care to trade for some? I have a good number of southern whitetail antlers, but not much worth a knife handle, imo.
I wouldn't be interested in any that are fresh from your wazoo, but...
As for dying, I'd have to think that you could do it on your own with some dye. I regularly soak antler to soften it (three days in a bucket of water and you can whittle it like wood) and it really absorbs water. The longer I leave it in, the more of the brown that comes off (this is just a stain from the bucks rubbing against trees). A bit of dye in the water would seem to do very well in penetrating through the antler.
I keep thinking of trying some strong coffee to get that brown color. Maybe some coffee and some iron filings and vinegar to act as a mordant....