Hi, there are many letter molds that you can use, rather than stencils. They are very easy to use – you simply roll out your gumpaste or fondant and press the letter – allow it to dry and place it on your cake – I use Royal Icing to secure it to the cake and/or cake board.
These molds are readily found in any store that sells baking/decorating supplies – you can also find them in the internet. Try eBay – sometimes you can find them for less money, as letter molds can get pricey.
Good luck!!!
DJ - Fun Fiesta Cakes