I doubt it but since oyu have both derailleurs it is always worth a try.
Measure the width and also the diameter of the bolts.
You can try scrolling through here for pulleys. Triomphe will certainly fit but NR/SR may also do the trick.
http://www.ochsnerusa-store.com/products.php?cat=1
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk