For a dressing up thing, so quality and condition isn't important, but cost is. I've tried gumtree, eBay, local selling groups on fb, oxfam wedding dress site, but either nothing or the items are too nice and expensive. Also tried fancy dress places but can't find anything similar.
I'm thinking full length puffy ball gown pref white or very light fabric. Can look really really tacky and that's ok. There must be somewhere I've missed? Or will this be a charity shop challenge that will likely never be found...
If it's just for fancy dress, you should be able to do something around the back and cover it up with some lace or similar. Or even turn it into a corset back? How much too small is it? Do you want to post a pic for ideas?
It's got a back with buttons closely together all up the back, maybe I could elastic the buttons with button hole and put fabric behind? [clueless]. It's a size 10 but since it's vintage the sizes tend to come up smaller so assuming more a pn eight. I'm a 12...
That might do it. Depends how active you're going to be. Also how neat does it need to be? Is there much extra fabric in the side seams? Or is there any extra fabric where it fastens? I'd be tempted to see if you can make some holes (possibly eyelets) and lace it corset fashion, either putting fabric behind or just leaving it with ribbons and a glimpse of skin on show.
Sorry. I didn't mean to make it sound complicated as it really isn't. All you doing is making the back lace up rather than fasten with buttons or zip.
If you google 'change dress to corset back' there's loads of guidance.
If it doesn't need to be neat, it's even easier than they suggest as you can get away without sewing loops onto the dress. Basically do it up as far as it'll go with the buttons or zip, then make some holes on either side the rest of the way up (trying to do it in firmish fabric a bit back from the edge of the fabric), then lace it up with some ribbon, just like lacing shoes or boots.
I hope that helps. I'd be really happy to do it for you if you lived near.
Pants the dress has aired today and the top and bottom button does uo and it looks fine from the front but alas all the other back buttons won't do up. Can I pm you a picture of the back to see if you think it'd be easy for me to sort out?