I don't know of any conditioners that will give you shine, but you can get great shine from cassia obovata...which is sometimes called "neutral henna". Cassia can impart a golden stain to hair if you let it dye-release, but that takes 12 hours. If you want to use it for shine only without the golden stain, just mix it with warm water and apply to hair, leave on for an hour or two, rinse, and you will have awesome shine for about a month.

Hennaforhair.com is a reliable source for cassia: