Results taken from...
http://www.pullmanford.com/heatercores/heatercoreinline.asp
89-93 Ford FESTIVA - 6"x6.125x1.25" - Autozone price: $99
Link Ouch!
89-91 Ford PROBE - 7"x6.5"x1.34" - Autozone price: $51.99
Link! Ouch!
85-90 Geo SPECTRUM - 6.25"x6.375"x1.75" - Autozone price: $51.99
Link! Man... these little guys are 'spensive!
89-97 Geo TRACKER - 5.5"x5.75"x1.25" - Autozone price:
$259.99 Link! Holy crap! It is so small and cute... $260???
85-88 Chevrolet NOVA - 6.25"x5.5"x1.34" - Autozone price: $40.99
Link! Getting better!
(I used to own an 88 Nova... fun little P.O.S.)
85-99 Chevy Truck ASTRO & SAFARI - 6.25"x5.375"x
1"!! - Autozone price: $32.99!
Link! Getting MUCH better... a ONE-INCH heatercore? $33? Happy day!
90-94 Hyundai EXCEL - 6.5"x6"x1.625" - Autozone price: $139.99
Link! Ouch!
83-86 Toyota TERCEL - 6.25"x5.5"x1.34" - Autozone price: $38.99
Link!
86-95 Suzuki SAMURAI - 5.125"x5.625"x1.25" - Autozone price: $51.99
Link! Not bad... only 1.25" thick.
I say... the $33 one-inch heatercore is worth checking out... I may go by the store today just to see it in person.