Help, sleevless vest for dd's christening in 3 weeks

[chipo]

I know this sounds easy but I need one with thin straps. I have found this but they don't do plain ones . Pref cream but can live with white. Please help.

tesco do sleeveless but not thin,though

anyone

does she need a vest at all?
if it's cold might it be easier to put a cardi over the top of the dress or whatever than a vest underneath?

ebay There is a selection of sizes on here.