There was a post about him holding that guitar on the front cover of some magazine.
Seems like he seems to be using the donnie a fair bit. At least we know where one of them is.
p.s.
TUFNEL: Yes! So on a chart, instead of writing A in music terms-we're playing in the key of A-you go: I for A, 2 for B, 1 for A and 3 for C. See? [Fig. 1] That's so much simpler.
GW: What happens in the case of a chord like G13?
TUFNEL: Okay. This is my other theory:
If you're playing that type of music, you shouldn't be doing it.
GW: Shouldn't be doing the Nigel Tufnel Theory of Music?
TUFNEL: No — you shouldn't be playing
music! Because what good are people who do that jazzy sort of stuff? It's all too low-volume. Have you noticed that? What are they trying to hide? What have they got to be embarrassed about? If you're a good player, you play loud so people can hear it-that's why we plug these things in. If you play an
electric guitar — I don't care if it's a Gibson 175 or a Charlie Christian — turn the ****in' thing up!
To those people who do that 13th stuff I say, "By the time you count to 13, who cares? The song's over anyway. So let's play some serious rock and roll." It's all very impressive, I suppose, for some musicologists who play jazz and all that — let them have their way. But they must be afraid of something if they're not playing loud.