White/cream summer jacket/trousers for man (Benson OX10)

I'm getting (re-)'married' in Spain in September (we got married in a register office a few days before Covid lock down and haven't had a chance to celebrate with family since then!). So I need lightweight white or cream jacket and trousers for the occasion (on a boat/beach!) and despite trawling the charity shops can find nothing remotely realistic in price!
If you have such item(s) in a size 36" or 38" jacket, 30/32" waist, 28/30" leg approx that you no longer need, I would be so grateful! Long shot, I know, but worth a try :)