Chinese New Year
Probably your best bet is just going to Party City (multiple locations in Oakland Co.).
Otherwise, there are some LIMITED decorations at World Journal (Chinese) Bookstore at 30805 John R Rd in Madison Heights 248-585-6007, and at Fuji Market 31722 John R Rd also in Madison Heights 248-307-9688... both of these stores are near 13 Mile Rd. A Party City store happens to be right across the street from Fuji Market.
How about if you make a post after your party, letting us know what was served and how it was made or obtained?