Nicole, there has been a similar discussion about this topic not so long ago here on the board. If I get a little chance I will see if I can find it.
I would go with pencil skirts and a top as they are less ' dressed up' then a dress but stylish, fun and curvy. Lots of ladies who rock their pencils REALLY well on here so you can find a ton of inspiration. I also sometimes wear a dress if I can pop a cardigan or blazer over it (or a coat in your case).
all of the pants from PUG are dreamy if you can fit them into your work regulations :)
There are dress our pin up dresses out there that are very business looking that still show off your curves that might work. I post a dress that I have ( sorry, don't have a picture of me in it), But it is from the Betty Page clothes line.
Would it be too casual in your workplace if you wore fitted cardigans, perhaps adorned with pretty brooches (sounds like you couldn't do a rhinestone spider pen, but they certainly couldn't say you were crossing the line with cherries or flowers)? And Brandy C.'s pencil skirt suggestion would be perfect with the right sweater or shrug. Are you allowed to wear hose and heels of your choice? Good luck, honey.
I bought several dresses to wear to work in DC. It's very restrictive. Solid colors, sleeves, no cleavage, must be knee-length.
So far, the winners are:
The Beverly Dress
The Colette Dress
Havana Nights Dress
Birdie Party Dress (worn with a camisole)
Lauren Color Block Dress (worn with a camisole)
Military Pin-Up Dress
Natalie Dress (worn with a camisole)
Rockabilly Retro Diner Dress