Fabric cafe (fabriccafe.com) is my source for 3 yd patterns. Found them at the Houston QUilt Show last year. They bundle 3 coordinating yards of fab with a pattern included for a set price. Last sale that was $15 and change for the bundle including pattern - shipping was $3 total. Not sure if that sale is still going on - promo code was SHIP. I have several of those patterns now so it's a great resource.
I also have several 5 yd patterns from other places, but those make a pretty generous sized lap quilt. These are large baby or average lap. Lots of uses for such things - even table covers, something to keep in the car - drape on a chair, toss at end of bed ....