Francois Rabelais rose is close to Piano, but also out of stock from Heirloom Roses.

Red eden/florentina might not be the exact color as piano but are both cup shaped and bloom well. Red eden is continous and florentina in flushes. But they are both climbers. Out of roseinheim has cup shaped red blooms.

I second Red Eden as a look alike.

Another tantau, Ascot, or Rouge Royale might do for cabbagey cupped red roses? But I've worn piano as a boutonniere and the blooms are roughly 2.5 inches across

And here is florentina, found at lowes, flowers last a long time. 2nd yr grafted. Does not bloom as much as red eden. Thorny beast, very very thorny and grows super fast. I love this shade of red

Leonardo da Vinci looks a little like happy

Thank you for those photos! Yes, I am going to purchase them at Heirloom Roses! Any look-alikes for Wedding Piano or Charming Piano?

You might consider Spirit of Freedom if you want another many petaled, deep cupped rose. It's a pink lilac color. Helen has shared some beautiful photos on this forum. David Austin and Heirloom sell it. I got a great plant from Heirloom on sale last year.

The Mill on the Floss makes me think of Charming Piano.