[NTG-context] If a Font Has Ligature Glyphs But No Feature?

I downloaded something that purports to be Century Expanded from fontsgeek.com. Although the font has fi and fl ligature glyphs, it does not have a ligature font feature and ConTeXt does not use those glyphs. Aside from purchasing a real font product from Linotype at enormous expense and hoping it is better equipped, is there a way to coerce ConTeXt into using the ligature glyphs for fi and fl?