[comp.sys.apple] slot xpander for //e?

Rankins@DOCKMASTER.ARPA (07/13/87)

Does anyone know of a slot expander for an Apple //e?  What I need is
something that will hold two cards that you can switch between depending
on what is required for a particular application.  (In my case it would
be to be able to switch between my Microsoft Softcard //e and my Apple
//e 80 column card.  Most of the time the Softcard works fine, but I
have some applications which require the double hi-res graphics
capability of the 80 column card and it's a pain having to open up my
Apple and swap cards just to run a particular program.)

What I have in mind is a box with two (or more?)  slots in it that you
can switch between.  The switch would make the connection between the
slot and a ribbon cable which would run from the box and have a slot
connector on the other end to plug into the slot in the Apple.  I
realize this could be a dangerous thing if someone were dumb enough to
switch between boards while powered up, but let's hope no one is that
dumb.

Does anyone know if such a device is available, and if so, who sells it?
If not, does anyone know if someone like this could be easily "homemade"
or would it require some complex circuitry that would be beyond the
capability of a "non-expert"?

                              Thanks in advance for any help,
                              Ray

                              Rankins@Dockmaster.arpa