Findoggy...You maybe referring to the attachments made for the Cub Cadet Model 73 (and other Cub Cadet Models) 3-point rear hitch
? If so...The Brinly-Hardy Company (originally in Louisville, KY...Now in Indiana) made a whole host of rear mounted attachments that hooked up to their sleeve hitch that mounted to the 3-point International Cub Cadet hitches.
Brinly-Hardy made planters, plows, discs, cultivators, fertillizers, lawn rollers, lawn sweepers and MORE! Today, they still manufacture sleeve hitch implements (and 3-point implements too)BUT no longer make the sleeve hitch itself. Brinky manufactures mostly plows, discs, dethatchers, box blades, lawn rollers and rear fertillizer rotary spreaders. BUT, you need a previously maufactired sleeve hitch to use these attachments
The sleeve hitches and 3-points (and NEW & OLD implements too) are on "E-PAY"
(pricy...but necessary if you're gonna mount rear attachments to your older Cub Cadet models
. Just do an Ebay "Brinly" search and you'll probably pull up 20 or more items