Looking for Mathcad 4.0 First disk

I tried to install the first disk, but the
floppy head made a groove on the outer ring of
the disk and now it cannot
be read. I would like to use
this edition on my old
386SX, because I have some old
applications packages which Ihave bought
back in 1993 and that's
all I need to be using
on this system. If anyone out there can help me,
I will appreciate it. Please,
e-mail back at wqa2@peoplepc.com
Thanks for reading me.