The funny part is, if he had used a Fender Twin, then everybody would want to sound like that. There’s nothing magical about that amp, or those guitars, or that guitarist. Don’t get me wrong, I am a huge Zepplin fan. I am just saying you don’t need to sound like he did on those albums to create music.
But if you are interested, I’d be glad to shove the amp of your choice out a moving van, and then repair it incorrectly. Half price, only $5k!