I thought I was done with this place, but...one more post for old time's sake...
I've researched this quite a bit and it is definitely more economical to cut your own lace, especially in the long run. You also have more control of how the lace comes out as far as beveling, splitting, etc.
You'll have to research cutting tools to see if you want to make them yourself or buy them. I don't have have as garage full of power tools, lathes, mills, etc., so I opted to buy one and be done with it.
HTH...good luck...