Jacob's Ladder

I came across this one in my research for new parents for potential breeding stock. JL is Santa Claus x (hybrid of R. soulieana x Dortmund). With this parentage the chance of seedings being disease resistant should be high. Is anyone working with JL? Is it fertile either way and where can it be obtained? HMF lists Edmunds’ Roses but I didn’t see it listed on their web site. Thank you.