4' bifold door track?

A home owner from Pittsburgh Pa. says:
July 14, 2012
I am in need of a track for a metal bi-fold closet door. 4 foot opening. All I see in you parts list is the track for the 3 and 6 foot openings. Is it possible to cut the 6 foot track (21-403) or am I missing the part number foot the 4 foot track?
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Casey from SWISCO responded:
July 17, 2012
Thanks for contacting us! We actually do not have the 4' track online, but I will work on it for you! Please keep an eye on this thread. I will post here again as soon as I have more information available.
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Casey from SWISCO responded:
August 6, 2012
Please see new SWISCO product code 21-404, bi-fold door track for a 4' opening.
Bifold Track, 6' Opening
Bifold Track, 6' Opening
21-403
$18.57
Bifold Track, 4' Opening
Bifold Track, 4' Opening
21-404
$12.75
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