Othram or Astrea.
@othram David Mittelman, the CEO of Othram is a member here. He confirmed that cremains are tricky and there is not a lot of chance to get DNA. Ive worked with cremains as an archeologist and theyre fairly sterile.
But why not give it a shot? Nothing to lose. Are there some substantial teeth and bigger bone fragments that have not shrunk and melted among the cremains? If so, it may be worth trying.
If not, technology is rapidly evolving, who knows what will be possible in 5 or ten years from now. Until then it is vital to keep the cremains free from further DNA contamination and dust.