What kind of colour would you love for your new coat? For that matter, do you want a solid colour, or some kind of pattern/texture?
Also - not sure if this helps, but I was trying on coats in the local Marshall's store, and the Jones New York brand seems to be cut larger than some other brands, and I'm pretty sure they go up to 16/18 in most dept. stores. I know what you mean about Lane Bryant. I shopped there before, and I have 'issues' now with that place. They don't strike me as a good place for a coat though (black, beige, grey most likely) - even though I used to find other things there that worked for me.
Meanwhile, on the myshape website - there's some interesting looking coats.
Have no idea how these fit, but some of these look cute/non-boring to me:
http://www.myshape.com/jessica.....gner/10385
There was a Jones New York sort of plaid type of coat with nice wide collar on this site as well, but it was double breasted, but I'm still not sure of what shapes work on people (can't even figure that one out for myself yet..).
http://www.myshape.com/jones-n.....gner/10147
The Kenneth Cole New York Cream Coloured coat in this link looks pretty nice (maybe not as funky as the other cream one you posted earlier), and it goes to a 16:
http://www.myshape.com/kenneth.....gner/10463
For some annoying reason, the myshape site doesn't allow me to click on over to the Plus Sizes and see what they have to offer in Plus ....kind of a pain. Plus, I seem to be challenged in trying to put a link to a single coat from that site.
In any case, it might be kind of interesting to do their questionnaire and see what they recommend for what will fit you well. They do 'sizeless' shopping on their site. Kind of interesting - and it's surprising all the different sizes that apparently will fit me.
Meanwhile, I am in a similar boat as you - need a new coat - and I've really been enjoying all the great links in this thread