Don't use stove top (although, in my personal experience it is what children prefer!), pepperidge farm dried stuffing mix is wonderful, you can doctor it up anyway you want.
I grew up in New England...the large Sunday dinner (usually with roast beef or roast chicken with all the fixings, and drippings) was the norm in most homes (ok...this was the 60's and 70's!) and I think the Sunday dinner is still alive and kicking in some form or another most places. Even if it isn't a proper Sunday roast, it is usually a larger fare with family or guests and a special pudding!
Before moving to the UK I never knew pre-made yorkshire puddings existed! To tell you the truth, I haven't looked to see if they exist here in VA. When I make yorkshire puddings, I make my own...really not too hard and it doesn't matter what shape they take if you smother them in enough butter and gravy!
Oh...and the WalMarts I have shopped at usually have a varied vegetable section.