I was able to get PSUs for a 1047 and a 1066. They might still have some, you can email
sales@canaan.io and ask. Cost for a used 1047 psu was $115 + about $90 shipping.
It was a pain in the ass to order them ... had to sign contracts, wire $ to China, a lot of back and forth. Took a few weeks just to get the order placed.
If enough people wanted them I might consider being the middle man and placing another order, but not worth the time for only one unit.
If you have trouble getting in contact with someone, send me a PM and I'll get you in contact directly with the guy at Canaan I was dealing with.