Float Switch needed - DIY ATO

[Snaz]

I'm interested in a group buy but the ones you found on Ebay are not suitable for my needs.

"Specifications: Normally closed. (circuit is closed when float is in the "down" position towards the o-ring, circuit opens when float rises.) Maximum switching current 5W (~0.5A at 12VDC), max. voltage 250VAC. Wire leads are 40" long, ends are stripped and tinned. Maximum operating temperature 100C (212F)

Notes:
Unlike some float switches, the operation cannot be reversed from N.C. to N.O. by flipping the float."

I was hoping for reversible so I could have two floats installed, one to signal low(CLOSED) need water and high(OPEN) to turn off. The high float is redundant but does provide a measure of safety I want.

So yes if we can find suitable switches I would want 2 or 3 please. Thanks.
Keith