Here is a link to a Advent Christian Hymnal which contains hymns from a conditionalist perspective. If you know of other hymnals online or other hymns from a conditionalist perspective please leave a link in the comments.
Here is one taken from the Conditional Immortality section
O wond’rous gift! O matchless love!
Bestowed in mercy from above:
The priceless gift that all may claim,
Through faith in one prevailing Name.
Through Adam’s disobedience, all
‘Neath the death penalty do fall;
Sinners with him, with him man dies,
No endless life this life implies.
In the all-wise, eternal plan,
A hope is offered dying man,
And one is promised who can save,
And rescue from the cruel grave.
God’s only Son assumed man’s guilt,
To ransom him, his blood was spilt.
The debt he paid upon the tree,
And life eternal gained for thee.