The Real Ghostbusters Slumber Mate was released in 1989. It was sold in a series of "slumber" related items. However, all were made by different companies.
It can be found in Sears Christmas 1989 catalog along with a tent and sleeping bag. The sleeping bag has been identified since as being not by Imperial, but by ERO Industries.
- On page 17 of Teenage Mutant Ninja Turtles/Ghostbusters Volume 2 Issue #4, in panel 2, the The Real Ghostbusters Slumber Mate makes a non-canon cameo on the table.