Tried the fold up one from West Marine and it worked marginally but the dual lock adhesive strips I used would come off when you hit the unit. I saw a thread about this website and ordered it, $3795 + about $9.95 for freight, you just have to saw the bottom leg off and toggle the top fin under the console cowling and it fits snug. A Circle K 32 oz foam cup fits perfectly and stainless steel coffee cups and bottles do too.
Make sure you measure twice and cut once or like me, measure 5 or 6 times and you will get an accurate cut that fits.
Worth every penny it cost, (I have tried everybody elses)
Make sure you use the listed years on the link below.
tjinaz
Corvette Corvette Drink Holder, "Travel Buddy", Black, 1984-1989 - Corvette Parts and Accessories