I put in a cup holder in my 91 MR2 that fits indash just below the radio. I purchased it on ebay for just over 20 dollars, it comes from a 80 Ford Taurus. I will post a link to a current one being sold below.
Console Cup Holder Ford Taurus F150 Mustang Explorer:eBay Motors (item 380167671098 end time Nov-12-09 01:49:15 PST)