Well... That depends, as to which Spanish version of Sesame Street you're after.
See... "Spanish" can mean many things, in this case, the Spanish-language version of Sesame Street. And if you go down that route, I feel I should enlighten you...
There's a version of Sesame Street for the country of Spain named Barrio Sésamo.
To truly distinguish this one from Plaza Sésamo, you should refer to Barrio Sésamo as the true "Spanish" or "Spaniard" version.
Plaza Sésamo may air in Spanish, but that co-production is rully the Mexican version of the show. Another way you can differentiate between the two.
That said, you might want to contact either MuppetDude or Xerus who happen to have some Plaza Sésamo episodes on tape in their private collection libraries.
Hope this helps and have a good day.