While there are several free pattern Web sites to find vintage or old patterns on such as www.allcrafts.net and All Free Crafts. Sometimes we just can't find the right pattern.
One of the best places to search online for pattern is on eBay. Many patterns can be found in lots, on CD, and downloaded immediately after payment is made as a PDF file.
Here are some examples.
Crochet Concerto Shawl Pattern - Crocheted Shawl Pattern - Crochet Shawl Pattern Download for Kindle Crochet
Crochet Pin Wheel Afghan Pattern - Vintage Crochet Pattern for Kindle Pin Wheel Afghan Pattern Download
Crochet Bathroom Set - Pattern for Crochet Rug, Toilet Seat Cover and Tissue Topper Download Crochet Patterns
Vintage Crochet Afghan Patterns - 20 Handmade Vintage Crochet Afghan Patterns - Granny Afghan, Ripple Afghan, Chevron Afghan, Diamond Afghan and More!
Crochet Vintage Toy Patterns - Crochet Toys Pigs, Horses, Teddy Bears, Cats, Frogs, Horses and More to Crochet
Crochet Vintage Little Girl's Dress Pattern - Download Crochet Dress Pattern for Little Girl - Crocheted Cute Dress Pattern
A Few Patterns Available on Barnes and Noble Nook