Good luck klo, it can be done. My florist went out of business last week (minor panic) so had to sort that again. My hairstyle I didn't decide on until my final dress fitting last week. Order of Service I had to type up so I knew what was happening myself. Then it's just a case of sending to the printers or doing yourself - if you print off 2 to a page on A4, you can put a pretty card around and staple. Looks good and v simple.
I'd phone Moss Bros or whoever and make an appointment for the men, give it to your H2B and leave them to it.
And as for your bridesmaid I'd slap her, okay maybe not but it would relieve the stress. Just tell her either she wears the dress you've bought, gets one herself or isn't your bridesmaid.
Harsh but I'm sick of people trying to "tweak" the arrangements I've slaved over for ages, esp at the last minute when they could have spoken up before if there was a real problem!
Good Luck