A gift certificate to Sally's (if there's one nearby that the recipient could get too - in BK that's a tough one) or a local beauty supply. Or a company like Keihls and make a note in that card that it's for the Slik Groom the person likes or wants to try.....
I love gift certificates.
You could also purchase one of those hair "baskets" they have now at Sephora....I think Frederick Fekkai has a sample Shea Butter set out there....I'm sure they have other brands to choose from.