Sandusky has taken over the discontinued Pettit Stain formulas.

P-1095-2 - Pettit Replacement - Mahogany Filler Stain

All Sandusky Stains come in Quart size which you thin with Turpentine or thinner, brush on and then immediately wipe into the grain in a circular fashion to get the best coverage.  Dry and then apply at least two coats of sealer and then start varnish.