TattooLettering.net and TattooDesign.com offer text generators using Old English fonts for easy reference. As of 2015, Amazon.com offers a paper book titled "Gothic and Old English Alphabets" priced at approximately $11.
The text generators at TattooLettering.net and TattooDesign.com offer multiple styles of Old English font styles to use. Users type in the desired word, phrase or sentence, and the computer generates it for printing or saving to a computer.
Amazon.com also has several other books about the history and design of various Old English alphabets for a user who prefers to have a paper book as reference material. These include Celtic, Medieval, Gothic and generic Old English alphabets.