I meant to post this in February, whoops!
Here are some of the modified audios representing Spain and Latin America as a whole, some of which you've already heard. Namely, the solo guitar track from Volume 1 of my IASW Fanmade Audios ( • it's a small world: 19 Fan-made Tracks (Vo... , which is intended to sound as close as possible to the audio used for the Spain and Argentina scenes on the ride at the Magic Kingdom (since 1971, except for a few years) and Tokyo Disneyland (1983 to 2017, as “スペインのギター”, translated to “Spanish guitar” on the 2002 CD).
For once, I tried to isolate the instruments from the original audios myself — both the track from the aforementioned CD, as well as the original 1964 Spanish guitar track and the 1992 John Debney version of it — and the result was… not too bad, actually. So I played mix and match with the results, and the result is the four tracks that play before you today.
0:02 - SPAIN
(The original 1964 “Spain” track, augmented by the isolated solo guitar from the 1992 John Debney recording, also representing Spain.)
0:50 - SOLO GUITAR (MIDI instruments only)
(That's a lie; you can still hear the original track from my Volume 1 very faintly. I followed some of your advice and used the guitar soundfonts you recommended for the new version of MuseScore.)
1:38 - ARGENTINA, finalized version
(Isolated guitar from the 1971 “Spanish guitar” track, played together with the medium-quality guitar track secretly isolated by Rickydoodlebug [ • "it's a small world" ATTRACTION AUDIO CART... ] in 1978. Some parts of the isolated output inadvertently included the bird sounds from the TDL CD, so the volume was turned down and the 1978 track and MIDI tracks took its place in the foreground until the very end.)
2:26 - SPAIN, alternative version
(The same thing, plus castanets isolated from the 1964 “Spain” track.)
All images and audio belong to their respective owners. Photographs originally in black and white (“Café cantante” in Seville, by E. Beauchy, 1888) or hand-coloured (“Calle Florida” in Buenos Aires, by Olds, 1910) were (re)colourized by the website [palette.fm] and slightly modified in Photoshop. The image in the thumbnail is a still from the “Dance a Cachucha” scene from THE STORY OF GILBERT AND SULLIVAN (1953).