I'm not sure about this cultivar but,
I believe most lace leaves are dificult to get to root( i know at least one type will actuall root).
Also many cutting grown maples grow really slow if they are not grafted. Check out
www.evergreengardenworks.com for some great cutting grown maples.
S moss can be purchased at O.S.H prob Home depot, and rooting hormone can never hurt. Best of luck!