Apple IIgs memory

[Jim.Low@logicbbs.org]

My Apple IIgs ROM01 has a four meg memory card, which is at it's maximum 
population.  I'm finding my IIgs would be a much more convenient 
productivity machine if it had 8 megs.  What I'm looking for is another IIgs 
memory expansion card, with four megs, that will have a piggyback slot to 
allow me to use my current 4 meg card.  Are any still available?  If so, 
does any company still sell them, where I can pay by credit card?
 
Gee, I even run out of my 4.25meg memory just running AppleWorks classic.  I 
have needs to work with a dozen or so large files at a time -- some 600k or 
more each.

Next -- is there ANY way to get a IIgs to recognise more than 8 megs -- even 
if the memory over 8 megs is a RAMdisk?