I'm with you, Karen. Solaris has several that are on my "Wanted" list. Have you seen the GW offerings this year? They have at least one Saunders peony on there already, don't remember the name but it's a single red. I don't think their entire catalog is finished yet and it is for spring shipping; I know a lot of people don't order for spring but it's worked well for me.
There are so many beautiful tree peonies out there, Alex, hard to decide which one to choose! It'll be interesting to see how fast Pastelegance falls in price--it's pretty high demand but seems to be more robust than most. I'd think it'd have a higher supply than some of the less strong growers. For anyone who can grow it optimally it's worth the cost though--an absolutely perfect, huge, GORGEOUS flower.