Help me find a dress for "lounge suit" event?

[Roundaboot]

I'm going to a dinner at the end of the month and the dress code is "lounge suit". I need a new frock and I'm really struggling to find anything I like and that would suit me. I'm 45, 5'7", size 14, pear shaped but big boobs so need to be able to wear a bra and have decent coverage.
I really like this Mango dress but it's OOS for anything over size 12.
Budget up to c£100 but ideally less as I'm probably going to need shoes too (and that's whole other battle!)

"Lounge suit" as a dress code to me reads as "smart casual", so would any thing here work for you?

Dress 1 - 1 www.phase-eight.com/product/breesha-printed-dress-220903000.html

Dress 2

Dress 3

Maybe something like this might suit:

Dress 1

Dress 2

Dress 3

I would go something like these for shoes:
Shoes 1
if you can. Otherwise go for something completely flat like these:
Shoes 2

www.shein.co.uk/MOTF-PREMIUM-GATHERED-BALLOON-SLEEVE-FLOWY-DRESS-p-3414580-cat-1727.html?src_identifier=fc%3DWomen%60sc%3DDRESSES%60tc%3D0%60oc%3D0%60ps%3Dtab01navbar05%60jc%3Durl_https%253A%252F%252Fwww.shein.co.uk%252Fwomen-dresses-c-1727.html&src_module=topcat&src_tab_page_id=page_home1652444582711&scici=navbar_WomenHomePage~~tab01navbar05~~5~~webLink~~~~0

"Lounge suit" just means it's not black tie or evening wear- so office suit. It's smarter than "smart casual". That gives you loads of choice- basically any dress that isn't beach wear or an evening dress.