An excellent source on this topic is:
-The Clown Ministry Handbook
and
-Everything New and Who's Who in Clown Ministry. both by Janet Litherland.
These books contain general clowning information as well as Gospel skits. they're older books (80's and 90's) but still in print and available through Meriwether Publishing Ltd (
www.meriwetherpublishing.com).
Also there's something called Contemporary Drama Service (a division of Meriwether Publishing) that handles all kinds of Christian plays , clowning skits as well, I'm on their mailing list. (
www.contemporarydramaservice.com).
When I first encountered the first book, it was in a public library, later I bought both books over the internet.
Go for it-Blessings on you
Walmoe