Kaffir lime 90018 zip
I got mine at the OSH hardware store near Bundy & Olympic. I think it was less than $25. They also guarantee their plants for life, so if it dies, they take it back and replace it.
Strongly suggest calling and ordering over the phone -- they don't always have them in stock, but are really helpful when they have an order in hand.
I got mine at 99 Ranch years and years ago. You might also try any supermarket that serves the local Thai community. Many ethnic markets carry a small amount of often sought after agricultural specimens at or near the front end of the markets. If this fails, you can also try well stocked nurseries. These are becoming very rare as home centers are pushing most mom & pops out of business. I live in the Westside - Marina Gardens might have it and if not, they probably can order it.