This is as close to what I have as I can find. Mine are a strip of somewhat stretchy fabric with hook on one end, eye on the other. I wrap them around the straps just below my shoulders in the back and the straps stay up.
A lot of them do have matching panties. Also, most of the time their bras are buy one, get a second for half price and the panties are buy three, get two free.
Ha! 36DD is the ‘largest’ size a lot of places here that do pretty, sexy underthings go up to. Which invariably sell out the first. Which invariably leaves me struggling to find that one final elusive 36DD hidden at the back of the rack. 
There’s a (fairly) new range out in the UK of fantastically pretty bras in larger sizes, which I love. I managed to get two in a sale yesterday for less than a tenner each, which is great.
Later I was telling a smaller bosomed friend about this and she said: “Oh yes, I’ve seen that range, it’s lovely. I’m so jealous, they don’t do my size”. I nearly leaped over the table and strangled her with her own bra. How many years has she been able to choose from the full range of pretty, trendy bras, while I’ve been reduced to old lady over-shoulder-boulder-holders, and now, finally, someone’s doing nice bras in plus D sizes and she wants to take it from me?! Grrrrrrr.
Where?! Tell me now woman!!!
The range is called Freya,and I got them in Debenhams. Bravissimo also stock them. I got a pretty pink checked set, and a lovely pale blue set, for about £25 for the lot.
Go now! Run!
I think I will! Well, I have to go into town on Wednesday anyway, so I’ll have a look then. But, wooo!!! bras for larger busts at reasonable prices. You have made me a very happy woman. 