The C Clamps are part 6025.510, there is a new version 6025.650. This is what attaches the pump to the magnet.
It is not pure TI, both are actually stainless steel, the first was a lower quality Chinese made stainless steel and what we have used for the last 40 months is a German made 316TI, this is 316 stainless steel with added titanium, it is what the brake and fuel lines are made of on a premium luxury car.
I am the US distributor and I work in R & D. I answer all English language emails as well, worldwide.
For battery backup each pump would need a 6105.500, you would need a battery, each amp hour of battery rating is a bit more than 1hour of pump run time. You also ned a charger for the battery.
625, 6045 and 6055 all use the same magnet holder for 19mm or 3/4"