Here is a warm-tone paper developer.

Gevaert G.262: Water 750ml, Sodium sulfite 7g Hydroquinone 25g, Sodium carbonate, mono 90g Potassium bromide 2g Water to make 1 liter

Can be used straight or diluted up to 1:6. Straight gives a brown tone; dilution gives a red tone.

You could also try POP paper toned in an alkaline gold toner. This gives a purplish rose tone.