You want mail order specifically? I've gotten nutmeg scented (not my favorite, though; I traded it away) and also lime scented (much better! I kept this one *lol*). Both were from Home Depot of all places. Cheap too.
wilcat - papageno's is located here and his selections are amazing. Every spring he has a local sale with great buys, not always the best choices but they are wonderful. Good company. Piegirl
I ordered six scented geraniums last month from AlwaysSummerHerbs.com and was very pleased with the plants I received. One even arrived in bloom! My favorite is the rose scented.
I called a local garden center in late January hoping to order some scented geraniums. They weren't sure what they could get, but they called yesterday and had five scents, a flat of each. They have chocolate mint, rose mint, peppermint scented rose geranium, lemon and citronella. I had already picked up a citronella at another garden center, along with a lime scented ger. The five flats at the first mentioned garden center are quite leggy and not as strongly scented as the other two, but will work well for my project. I'll be infusing sugar with some of the scents for an herb program I'm presenting at church in two weeks.
I just placed an order with www.papagenos.com. Thank you for the recommendation. They have a nice large variety and was able to find one that I had been looking for. Scented Geraniums are my new passion!