Thanks Roger, that is exactly the advice I wanted to hear! At least I won't break the bank with this and I can take them back if they don't work. I will hit a couple of local Ace stores and get them, if not I will order them online. Also thanks for the Tractor Supply Joe - I will check there too.
WEll, I managed to find a set of c-259 springs at a hardware store. They are the C-259, not the CS-259 - so I am not sure it makes a difference. The specs are :