I just bought some used clear headlight covers for a 1990 Jetta to do my round headlight conversion, and they're a pretty close fit. The height is perfect, just need to take off about 1.5" lenghtwise, and a little sanding to get the curve right on the grille side of the cover. You also need to switch sides; use the Jetta's left side cover on the Festy's right side and vice-versa. And the only downside is that the covers each had three black horizontal lines printed on them, but I easily scraped them out manually with a penny (which removed the lines without scratching the plastic) and then polished the remaining traces with my Dremel and a polishing wheel and compound. Got the covers for 10$, and might be less of a hassle to find than Festy ones. Here's how they looked like when I got 'em:

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