328 Steering Rack boot clamps

I plan on removing the metal clamp on steering rack to replace old fluid. I was going to buy new metal boot clamps but since I am only pushing the boot back I need a clamp that can be opened flat to go around the boot. The metal ones all seem to circular. Would a heavy duty tie wrap the kind used for securing duct work in hvac systems (about 3 times as wide as a normal tie wrap) be Ok to use. I have special tool to tighten the tie wrap. I just dont want them to slip.

Thanks