Superior Monopoly is great in the LA and brandeesmom provided a link. Another equally effective monofilament is Fil-Tec Essence but it is nylon not polyester. I have used both and have been pleased with the results on both.
Fil-Tec usually has booths at the larger shows. They no longer sell direct to the end user on line unless you make a minimum purchase and have a resale certificate. I found a couple of sources for the mini cones which work fine on a LA.
http://www.allstitch.net/department/...ools-10618.cfm
http://www.digitechpaper.com/product...-ftess1500.htm