Help finding a bra with a clear back strap please?

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I am rather large of breast (36f) and really can't get away with not wearing a bra. I've bought a corset back dress to wear to a function and so would like a bra with clear shoulder straps and a clear back strap to go under it. I've seen a few online but would love some advice if anyone has one of these? Thanks!

How low is the corset back on your dress? Wondering if something low backed might work better (from experience the clear shoulder straps hurt like buggery if your boobs are fairly big!)

Yeah, clear straps are most uncomfortable and also highly visible (in a bad way). Low backed sounds ideal.

Ok, well it doesn't have to be clear shoulder straps as the dress has decent straps. It comes down into a really low v at the base of my back and the back is criss crossed with ribbon so it looks like a corset. So a low bra that comes round the front again won't work. Argh, damn and blast my boobs, if they were smaller I'd happily go braless!

Can you link at all?

Would something like this work?

Debenhams do one with clear straps (and spare normal ones) and a clear back - we got one for dd2 to wear with her dance show costumes a few months ago.

That is super!!!!! SC, I'm ordering it now. I've been looking for flaming days and that fits the bill perfectly as well as giving me a bit of tummy control.
Can't link to the dress as I'm borrowing it from a friend.