Hi Mr. Nsmith,
I too have searched and tried different things to cut costs on spoons for bass fishing. You mentioned Lake Fork flutter spoons and this is what the spoon manufacturers call their casting spoons. The most cost effective alternative I think is to buy the spoon blank and put the split ring and treble hook on yourself. If you want special finish and feathers, that isn't all that difficult with add on tape, Devcon 2 ton, and Mylar on hook. Here's a link to the type spoon they use down on Lake Fork.
http://lurepartsonline.com/Online-Store/Casting-Spoons/Fingerling-Casting-Spoons.html
By the way, the bass and spoon on my avatar are both from Lake Fork.