You might look at Catherine's, or Lane Bryant. Both of these sell plus-size coats that are attractive and trendy.
No, I do not think that K-Mart sells trendy outerwear for professionals. To find trendy outwear for plus sized professionals, you should try Kohls or JCPenny.
Short is definitely trendy at the moment. You can find trendy plus size dresses on the following site: http://www.torrid.com/torrid/Homepage.jsp.
You can find some less expensive outerwear for plus size women at Burlington Coat Factory, which is an outlet store. You can also visit Fashion Bug, they have a plus size section and they have real nice outerwear for plus size women at a real good discounted price.
overstock.com should be helpful in allowing you to find the best prices for plus size clothes, and it offers an extensive selection of outerwear. With this website you can compare prices and the quality of clothes to find the best fit for you.
"JC Penny has a wide selection of Plus Size Outerwear at an incredibly affordable, cheap price. Ranging from stylish belted coats to comfy fleece jackets, you'll find what you need there."
Lane Bryant also has a great fashionable line of outerwear for the plus size women. There outerwear is in style and very pretty. They are always up to date and current.
You need to watch your budget and find great tops for your mom. You need look no further than Trendy Plus Size Clothing: http://www.avenue.com/womens/clothing/trendy-plus-size-clothing
The best brands of plus size outerwear include Land's End and Columbia. Jessica London also makes very nice items. For fancy occasions, Tahari has a line of dress plus size women's coats.
kingsizedirect.com specializes in men's clothing for those who are big and/or tall. They also have outerwear, so this is most likely to place to find the best diverse selection and therefore what you want the most.
The easiest way to find wear to buy plus sized Columbia outerwear is by using the site Bizrate that provides prices and links to stores selling them. Finding them cheap and authentic would be your hardest hurdle to cross since most name brands have many knock offs.
Most known places for acquiring trendy plus size clothing are shops such as Marisota, Simply Be, Torrid and Ashley Stewart. All these places consist of wide ranges of trendy up to date fashioned clothing for plus sizes.
"Some department stores that provide plus-size outerwear are J.C. Penney, Nordstrom, Ashley Stewart, and Lane Bryant. Other stores include Torrid, Land's End, and Eddie Bauer."