Suction cups for moving large tank?

[NorthernCoral]

I am going to be moving a large tank here in the next little bit into my house (265g) and am wondering about the suction cup handles that everyone uses to move glass/ large aquariums. Where do you get them? How much do they cost? Just want to be 100 percent I am using the right product as there is alot of time/money on the line when moving a tank and I would hate to **** it up!