Here is my answer; I borrowed the tune from The Green Fields of France, and also some of the phrasing. Without permission, so I am not claiming authorship here.

Lament Of the Crematory

O where have you gone, my grandmother sweet
I thought that I had your grey ashes to keep
But sad lamentations are rising now here
It isn't just you who has vanished, I fear!
I see near your gravestone more mourners so sad
And some now are wondering, where is dear old Dad?
We all thought you resting in peace somewhere nigh
With no more earthly ailments over which to sigh
CHO:
Did they burn the fire slowly
Did they cremate your lowly
Earthly remains, which you thought left behind?
Did Ray Marsh hide you out in his forest?
Now will Sperry, ME, find your last place to rest?
When you died we all grieved and wept sorely for thee
But that was way back in nineteen-ninety-three
Last week we were happy you'd seen our young strife
And though we still missed you, we'd gone on with life
But now that we know you are not where we thought
We cannot rest easy not knowing who brought
Your ashes, or mortar dust, home to us then
And we weep and we wail, all over again
CHO
So now they have dogs and they search through the day
Finding bones and small pieces, and mummies, they say
Some lay in the dirt, which we'd shunned for your sake
With others in backyards, the woods and the lake
So far the lost dead number hundred times three
And each day they find more, just wait and you'll see
A long prison sentence looms for Ray Brent Marsh
But the grieving still weep and their mourning is harsh
CHO
So now Noble, Georgia's on Lexis.com
And no-one can know when their love will come home
To rest, for a while, on a mantelpiece shelf
In an urn or a box with an ornate old elf
The bones from those piles are nobody's now
There isn't enough DNA to allow
For proper identification for all
For O how much longer shall our sad tears fall?
CHO

I hope I have not offended anyone, especially the author of the original song or tune.