Your's probably sounds 10 times better than the new ones will.
while it's not the greatest quality (mp3), I digitized this, doing a sort of ½ speed mastering thing. I played the disc & digitized it at 33rpm. I digitized it at 192kHz/32 bit. I then speed/pitch corrected it & downsampled to 44.1kHz/16 bit. Then I did the mp3 thing. I noticed a big degradation in wave, going from the native resolution to CD compliant. The headroom in the bottom end disappears & the bass gets muddy. mp3 kind of boosts the mid-bass & tightens it up a bit, but then wreaks havoc on the treble...I actually had this 45 single in my collection, it was given to me as a promo copy back in the early 80s. Had the drilled out hole off center. Some one stole it. I had it in a special container same as a few others.
Great song I've always loved it. That Plant crying scream near the end is just awesome.

Still maybe worth listening to. Interesting to do the speed mastering thing, actually pretty cool. I might try it on some of my 12" 45rpm discs...