I was just going through a box of some of my doll stuff two nights ago to get my LLL playsets out and this unknown doll thing was with my stuff. I had no idea what it was. I had been thinking about looking it up even though it was kind of hard to tell what it even was. After looking up a web site to see what this post was talking about to see if I had anything I realized the company and dates kind of matched and so did the approx size. I did a little research and found it was a part of one of the sets. I'm pretty sure this piece that I have is a driveway that fits two playsets.
#5160 Deluxe Cottage Assortment (1989-1990)
#5162 Country Kitchen Cottage (1989-1990)
Here is the link to the picture of the piece. I can double check at home sometime to but I'm pretty sure that's the odd piece I have. I mine might have the poles in it still.
Look for TOT Part #: FPT6703
http://www.thisoldtoy.com/fisher-price/dept-7-playsets/o-precious-places/driveway-patio.html#6703Let me know if you need it because I don't need it and I don't want it lol. It's free if you pay for shipping (USA, 61701) or I could hold it for you in case we decide to ever do a trade or something then I could just include it if I send a trade item.