1967 1968 Ideal Super City parts:(2) "building extenders", no tears, never used?

Description

1967 1968 Ideal Super City parts: (2) "building extenders"
- no marks or tears
- never used ? (still folded tight and flat)
- Ideal part # CP-7052
- "building extenders" were included in the following 1968 sets:
- Town & Country (2)
- Skyscraper (4)
- Skyport (4)
-
but will fit all
1967 and 1968 building sets
- expand or complete your Super City set(s) !
(2) "building expanders" weigh 1  oz.
fully loaded and ready to travel weight 3 oz.
will ship in an envelope with cardboard on each side
envelope size is 10" x 6" x 1"
NOTE to my Canadian neighbors:
Please be sure that shipments from the US to Canada are allowed, due to COVID rules
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Ideal Super City history:
Ideal Super City sets were produced by Ideal in 1967 and 1968 only.  They were “scaled to fit all Motorific cars and trucks”.
The 1967 product line
was, from small to large:
Landscape Set
Roadway Accessory Set
Action Accessory Set
Starter Set
Builder Set
Town and Country Set
Skyscraper Set
Giant Set
The 1968 product line
was, from small to large:
Landscape Set (box unchanged from 1967 ?)
Roadway Accessory Set (box unchanged from 1967 ?)
Basic Building Set
Town and Country Set
Skyscraper Set (w/helicopter)
Skyport Set (w/helicopter)
No changes were made in the scale between 1967 and 1968 so all parts from both years are interchangeable. Most parts were packed in individual plastic bags, except for the parts that were displayed on the orange plastic display box inserts. Many of the smaller parts ended up in Mom’s vacuum cleaner, so they are the ones that are most frequently missing.
Many of the box inserts were discarded by kids (and parents ?),
as they made it difficult to put all the pieces back in the box.
Canadian versions of many (all ?) of these sets were made as well.
They contained an additional instruction booklet in French and the set box covers were printed in both French and English.
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I use all recycled boxes and packaging materials. I never charge a "handling" fee. I don't believe in making a profit from shipping. Your postage charge will be actual postage plus insurance (when required).  If you overpay postage I will refund the difference. (check my 100% feedback)
How do you know you overpaid ?  I print the actual postage cost on the shipping label.
I gladly combine shipping
- saves you money, saves me time ! Returns accepted only if the item was grossly misrepresented !! Buyer pays return postage. (If item is unopened must be returned unopened.)