As mentioned, here is a rundown of what I can provide in the different Furniture series for your catalogue. In most cases, I have everything but one or two pieces and will often just mention the piece I am missing for the sake of brevity. Here we go:
Alpine Series - Missing the Chair, Closet, Shelf and Sofa
Astro Series - Complete
Balloon Series - Complete
Blue Series - Missing the Bench, Dresser and Wallpaper
Cabana Series - Missing the Bed, Bookcase, Vanity, Wall Radio, Wallpaper and Flooring
Cabin Series - Missing the Table
Card Series - From Gracie's Store. No items acquired of it.
Classic Series - Complete
Creepy Series - Complete
(E)gg Series - No items. Available at Easter.
Exotic Series - Complete
Golden Series - Missing the Closet, Screen, Wall Torch and Flooring. I have an extra Bed and Wallpaper for it though.
Gorgeous Series - I have the Chest and Sofa and an extra Sofa from passing some Gracie Fashion Checks. Nothing else acquired yet.
Gracie Series - From Gracie's Shop. No items acquired.
Green Series - Complete
Harvest Series - Complete
Ice Series - Complete. I have an extra Ice Table also
Jingle Series - Missing the Bed, Clock and Piano
Kiddie Series - Missing the Clock
Lovely Series - Complete
Mermaid Series - Complete
Minimalist Series - Missing the Vanity
Modern Series - Missing the Wardrobe
Modern Wood Series - Complete
Mush Series - Complete
Pave Series - No items. Available at Festivale
Polka-Dot Series - Missing Bed
Princess Series - From Gracie's Store. No items acquired
Ranch Series - Missing the Armchair, Bed and Flooring
Regal Series - Complete
Robo Series - Missing the Chair, Dresser, Lamp, Stereo and Table.
Rococo Series - Complete
Sleek Series - Complete
Sloppy Series - Only Sloppy Sofa acquired so far
Snowman Series - No items acquired
Spooky Series - Complete
Stripe Series - Missing the Bathroom Sink, Closet, Dresser, Lamo, Sofa, Table, TV and Flooring. I've only acquired the Bed, Chair, Clock, Shelf and Wallpaper.
Sweets Series - From Gracie's Store. Thanks to Stratos, I have the Boockase, Dresser, Player and Sofa. Missing all other items.
Some other sets and items of note:
Bingo/Ski Series - As mentioned before, I have the Curling Stone, Lift Chair, Ski Rack and Slalom Gate. Missing: Bobsled, Snow Machine, Snowboard, Snowmobile, Ski Slope Wall and Ski Slope Floor.
Nintendo Items - Have all but the Super Star
Savings/Post Office - All items acquired
Pascal Items - Have acquired all items
Brewster Items - Have acquired all items
Gulliver Items - Missing Gaudi's Lizard and Matryoshka
Katie Items - Missing the Digital Photo Frame and Toy Camera
Campers - Need the Smoker, Stewpot, Backpack and Sleeping Bag
Nat - Missing all items except Cicada Stereo and Gold Bug Trophy
Chip - Have the Crab Clock, Dab Table, Football-Fish Lamp, Sea-Anemone Bed, Squid Chair, Marine Pop Floor and Gold Fish Trophy. I have extras of a few of these pieces as well. Still require the Marine Pop Wall, Bronze Fish Trophy, Flounder Table, JellyFish Lamp, Octopus Chair, Puffer-Fish TV, Red Snapper Chair and Silver Fish Trophy. So maybe if someone has extra of those, a trade could be made.