I'd just use a brick, you don't need variable voltage. You could use a Z750 brick, cheaper than buying the whole rig.
@NYC 428 posted:
Are the Z 750's still available? I understand that MTH will no longer make the Z 4000 as the UL has run out.
GYJ recommended a Z750 for the additional Christmas track that I'm working on and I went to eBay and purchased one.
If a used one is as reliable as my regular layout Z1000 ,I don't expect any problems .
I still saw some without the controllers that were available on the bay. 🙄