Elle McPherson used to do a lot of 30s, and they randomly do them on some lines, with no consistancy. I have got a few old ones, which were some of the best fitting I've had which is very annoying.
Thats one of the things that annoys me most about M&S - they make to do with the wrong size. I think I was measured as a 34B too. No way did that fit! They have this reputation for underwear and its total bollocks.
The department stores (HOF, Debenhams, Selfridges, JL) and Bravissimo are the only shops that seem to have their act together. And even that generally depends on the size of the branch. They will often order in size from other branches if they haven't got it in stock though. ASK!
Its really helped me to know which brands do a good range when I'm shopping on high street, but it is difficult to get bargins as they never have certain sizes still in during sales. Thats where mail order does win.
30 back specialists for D+ Cup (there are others but they tend to be more limited in range) All of the below do good 32D+ range too:
Panache Brands (each aimed at slightly different market)
- Superbra
- Cleo
- Masquerade
Eveden Brands (each aimed at slightly different market)
- Rigby and Peller
- Fantasie
- Freya
- Fauve
Curvy Kate - Brastop's own brand (now being stocked by bravissimo too though)
Debenham's Gorgeous range
MissMandalay
Bravissimo's Own Range
Aubade
Chantelle
Lepel
Lejaby (watch out for the sizing! Its french and slightly different to other brands)
I think figleaves have their own brand now too. I think there were only about 3 or 4 brands doing 30 D+ around 2000ish, so theres been a BIG change in the market especially with own brands popping up in the last two years. You can easily get bras for £10 - 15 now, when it always used to be £20+.
So yeah, in answer to OP question, have bras changed that much? Nope, but the market has and women are much more able to get the size they really are rather than being shoved into the wrong size.