Those are Gran Sport/Valentino shifters. The cable guide probably isn't even really needed, but it will cost more to fix than to buy another set. Hopefully you didn't pay more than ~$20. They should be cheaper than Records (although I like the knurled nut better & have a couple sets myself).
Edit - looking at ebay, if ID'd correctly, the Valentino version doesn't even have cable guides, so they're not required. The GS has 'em.
I'd still just buy another set and keep the levers as spares, keyfobs, or make em into earrings.
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Last edited by Ex Pres; 09-27-12 at 02:43 PM.