I have an update in my search for cheaper fills. Kint corporation off of Crooked Hill Rd. in Harrisburg (across the street from post office) will fill or swap. You can get a fill while you wait on the days that they have the equipment running. For new customers bringing tanks, you will have to drop the tanks off for testing before they will accept them for trade. They will also place stickers on the tanks and I was told that this is required by PA law.
5 lb. was $14.50 (including tax)
10 lb. was $23.32 (including tax)
Side note: this was the third time I have filled this 5 lb. for force carbing and serving 6 5 gallon kegs. Although I checked all the lines, manifolds, regulator for leaks, my post O-rings had cracks in the rubber. So lesson learned, check your O-rings!