If making your own is not an option for you, see if you can find the Duff brand of fondant; I’ve never tried it but I’ve heard that it is made by a different company and has a better taste than the Wilton brand.
There are mail-order sites that you can buy commercial fondant from; you’ll pay freight charges which aren’t cheap since this is heavy; but you can try Avalon Cake Deco, CK kichens, Cal-Java (aka Sweet Inspirations - they make the Fondarific brand which is getting good reviews but again I’ve not tried it). You can also buy direct from Satin Ice. Maybe there’s even a cake supply shop near you that would sell fondant. You don’t have to buy huge quantities but if mail order doesn’t work, the Duff brand is available at Michael’s/Hobby Lobby.