-90 ZR1 front replacement speakers ?
 

Is there any 50W/60W speakers that would fit front -90 ZR1 ?

Space there is really small.

I have had cd/radio, Alpine apm, 3-way rear speakers for years, but orginals are at front with amp removed.

One local Corvette owner did fix radio like this:
http://www.ifsascandinavia.com/moisio/alto.htm

But is there any easyer way.. Or is only way build cases?