TECHIE ROUTE:
This would be a fun project.
Actually you can probably do this with the free
Google Sketchup and then have someone on the internet to 3D print it for you. You can even put her favorite design or her birthday or your anniversary etc... on it....
ARTIST ROUTE:
Use this product, make a sculpture - upper part mold to the "cup", with cup handle exposed; lower part fit to the 4Runner cup holder. Let this cure, you will have your "custom" cup holder....

ray2:
<a href="http://www.amazon.com/gp/product/B0013UDWXI/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0013UDWXI&linkCode=as2&tag=jickrevi-20&linkId=A3JVC7BIHK5KX7GB">Apoxie Sculpt 1 Lb. White</a><img src="http://ir-na.amazon-adsystem.com/e/ir?t=jickrevi-20&l=as2&o=1&a=B0013UDWXI" width="1" height="1" border="0" alt="" style="border:none !important; margin:0px !important;" />
<a href="http://www.amazon.com/gp/product/B0013UDWXI/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0013UDWXI&linkCode=as2&tag=jickrevi-20&linkId=3UTJVQ4VSVWBDFYF"><img border="0" src="http://ws-na.amazon-adsystem.com/widgets/q?_encoding=UTF8&ASIN=B0013UDWXI&Format=_SL250_&ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=jickrevi-20" ></a><img src="http://ir-na.amazon-adsystem.com/e/ir?t=jickrevi-20&l=as2&o=1&a=B0013UDWXI" width="1" height="1" border="0" alt="" style="border:none !important; margin:0px !important;" />
While you are at it, mount a Nespresso machine back in the cargo area, plug it into the 120V outlet.
I am way bored on a Friday night.....