Long shot Want

Does anyone have anything suitable for wearing to a wedding in a size 22/24/26 (as in a large 22, true 24 or small 26)? I just realised I have nothing decent to wear to my bf's sister's wedding on August 1 and I don't want to show myself up by looking an idiot :(

I have awfull arms and legs so I'm mostly looking for tops with sleeves of any length and trousers or long skirts. Preferably something pretty but not OTT, and suited for a petite person or easily altered to be such as I'm only 5'. Other than that, I'm pretty open-minded, but please be aware that I do have an odd figure so don't be offended if I have to say no :) 

Also, very long shot, but I don't suppose anyone has a new, unopened bottle of Calvin Klein Obsession for Men Aftershave, do they? My mum's looking for one for my dad for their anniversary and, surprise, surprise, she left it a bit late (their anniversary's on Wednesday). She refuses to pay £30 to get it new instore at Boots, and that's the only place nearby that has it. Failing that, does anyone have one of those Perfume Shop (or whatever they're called) places near them that could pick one up at all? I'd need it posted by Monday at the very latest, by Next Day, so it could get here on time. I know that they have it for £19.95, so that's why I ask for it from there :)

I can pay Paypal or part-trade for things under my tags.

Thankye!