I heard this single thanks to my sister who had bought it. I bought my copy some time later at discount price. As with many novelty singles, the joke does wear thin after many times of playing the track. But the Matterhorn Project still goes on, as is demonstrated by their own website.
My collection: 7" single no. 281
Found: Disco Market, Den Haag, 1985
Cost: 2 guilders
Tracks: 'Muh' / 'Moophonia'