Hello and welcome to TU Cary.
In my opinion the best way to get templates is to use photo editing software and make them yourself. With a photo editing program all you need is a picture of a bait you like and your in business. You can crop the background of the picture leaving only the lure. You can them make it into any size you want using the software. The ratio dimensions will the same whether you make it larger or smaller. Once you get it to the size you want just print it out and you have the beginnings of your template. All you need to do then is to glue the image to some stiff backer board (thin cardboard like that found in shoe boxes works great for this) and cut it out. You might have to print the image out a few times while changing the aspect ratio (size) of the image. Just change the size and measure the printout until you get the size you want.
If you continue to build lures for any amount of time you will probably start drawing your own lures. If you end up doing this you will want to scan them and keep them in a folder in your computer in case you damage the original. Keeping a copy of all your templates on your computer is just added insurance in case you lose, or damage, one of your templates.
If you don't have photo editing software loaded on your computer there are several freeware versions on the internet that will do the job. Just do a search for free photo editing software. Or you can use the search feature here at TU as there have been several discussions on this topic.
hope this helps,
Ben