Granny, I am in the same position as you: I would like to try some CAST inductors but I don't dare since I can't justify the cost. Instead, I went with North Creek air core inductors---a 10g on the woofer and 12g on the compression driver. I have tried about a half dozen different types of crossover chokes and the North Creeks are the best sounding by far. They aren't cheap but I consider them very good value. Of course, CAST coils could leave them in the dust for all I know, but you have to draw the line somewhere.
The North Creeks are all wound to order so you can get any value you want. The website also has a lot of good information about different types of crossover chokes.