If it's only when the pump is running, then it's a line, not a seal. (As David N. said.) The plastic lines must have been pinched at assembly and have been wearing through ever since. On my car, I caught them before they wore through. They are worn down, but still intact ... so I moved them to avoid further chafing and I haven't had any other problems.
Actually, I suppose that I was quite fortunate. I discovered the chafing ... and a destroyed fuel pump connector ... because the fuel pump died. And I also solved a fuel leak I had for a while, which was from the O-ring at the pump and sender assembly. But that was never enough to leave a puddle.
Anyway, I think you will be able to use one of those nylon fuel line repair kits that let you splice in a new section. But you will probably have to zip-tie the lines a certain way, or shield them, to prevent it from happening again. And definitely check the electrical connector at the tank for deterioration. And if you have the tank down ... you might want to replace the fuel pump, if it's original. And in so doing, you would replace the O-ring at the sender.
I don't think you will have too much trouble with the straps. I live in a rust belt state, and that wasn't the real problem. Getting enough space to work was difficult, with no lift. And getting at the hoses was tough ... I would up replacing the crossover hose because it was deteriorated and didn't survive the removal. Removing the exhaust was difficult due to the rust. But once the exhaust was off, it all went okay.