Yes, Lunar Brewing is in Villa Park, on St. Charles.
I'd always consider Lunar Brewing (54 E St Charles) worth a visit and buying a fish sounds like a perfect excuse. Besides generally interesting brewed-on-premises beers they also have Old Potrero for a very reasonable $7 a shot. I find Lunar to be one of the most comfortable bars around.
Speaking of Villa Park, did anyone see the Reader restaurant section from a week ago? There's a Mexican restaurant in Villa Park I'd never heard of that got a shockingly high rating. Tierra Grill at 525 E St Charles. Anyone been?
For snapper you might consider Fisherman's Choice at 8918 S Commercial (3000 E). I was surprised but pleased to see it listed in the Slow Food Guide. They don't have a huge variety but snapper seems to be a strong area. They usually have red and yellow plus some similar (I think; anyone know?) Caribbean fishes like parrot fish and goat fish, all whole. I can't guarantee they'll have three pounders but you can call them at 773-734-8320 to check. Their fish is generally very fresh and prices are lower than almost anywhere. Commercial Fish Market across the street at 8913 is worth a look too.
I know that's a long way to go for a fish but there are lots of other nearby places to make the trip even more worthwhile. For an appetizer have some ceviche tostadas at the counter in front of Fisherman's Choice or go across the street to the taco and juice counter in La Fruiteria (8909 S Commercial). Le Creole is over on South Chicago (9174) for a good Haitian meal. For dessert stop at Casino Restaurant (9706 S Commercial) for a square of krempita and a cup of Turkish coffee You can get fresh masa for your tortillas at Cecy's Molino de Masa (8544 S Commercial; closes at noon). Pick up some excellent Polish sausage or even better German style at Polka Sausage (8753 S Commercial). Family Market (8933 S Commercial) has reasonably priced free range chickens raised on the family farm. Go to Calumet Fisheries (3259 E 95th) for smoked trout or salmon or better yet some smoked shrimp (would be a nice appetizer before the snapper). All these places and more are within about a mile of Fisherman's Choice.