"Rampant Colonialism" and "Colonial Adventures" are both "colonial" rules that easily lend themselves to VSF. RC is by Flagship games and CA is by Two hour wargames.
We are currently trying the set by Parroom station called "Valor Steel and Flesh" (VSF). Our Sacramento group likes any of those sets better then GASLIGHT. Maybe just because we can only count to ten and G-light uses that confusing 20 sided die. Or maybe because we can't remember an Acronim of more then 3 letters.
Good luck with what ever set you use. Besides, if you don't modify the rules somewhat, you aren't really playing VSF.