Could you wear pants that are stretchy (thinking a stretchy twill) so they have some give to them, but that shrink back to looking more like slacks? Or just generously-sized casual slacks? (generous in the hips and buns, I mean)
For the tops, what about...
http://www.modestclothing.com/cgi-bi...556&groupid=28 (a polo with 3/4 sleeves)
or
http://www.themodbod.com/products/Double-V-Tee (a Tee with V in back and front)
or
http://www.dillards.com/product/Sunn..._301_503092184 (peasant blouse too casual? I love the roominess of it, but bending over is dangerous)
or
http://www.victoriassecret.com/ss/Satellite?ProductID=1265724806257&c=Page&cid=13270 29226745&pagename=vsdWrapper (but not so "come hither" as this. Don't know what this style is called for sure, but something a little more 'discreet' would sure be comfy)
I'll keep looking. Peasant blouse isn't quite what I'm thinking, but it's in-between that and that last V-necked thing. Almost like what they wore in the 70s, the white muslin with white embroidery on it with a keyhole neckline. I'm sure you have seen them...
Kinda like this, but not quite so billowy:
http://www.coldwatercreek.com/produc...d-blouses.aspx
maybe a little more like this:
http://www.peacefulpeople.com/media/..._vents_1. jpg