Alternatively, ya'll could look for this General Motors heatercore for:
Oldsmobile
Custom cruiser Wagon
1987 through 1990
1982 through 1986, with A/C
Oldsmobile 88
1986 through 1990 (RWD)
1977 through 1985, with A/C, RWD
Oldsmobile 98 Regency
1986 through 1990, RWD
1977 through 1985, with A/C, RWD
Buick
Electra / Park Avenue / Ultra / Wildcat
1985 through 1990, RWD
1984 through 1977, with A/C
Estate Wagon
1987 through 1990
1982 through 1986, with A/C
LeSabre
1977 through 1985, with A/C
Riviera
1977 through 1978, with A/C
Cadillac
Brougham (RWD)
1987 through 1992
Calais
1979 through 1982
DeVille & Limo
1981 through 1992
1979 through 1980, with A/C
1977 through 1978
Fleetwood & Limousine
1979 through 1992
1977 through 1978
Chevrolet
Caprice / Impala
1977 through 1990, with A/C
Pontiac
Bonneville
1977 through 1981, with A/C
Parisienne & Safari SW
1982 through 1989, with A/C
It's slightly bigger, but should be cheaper. (just don't buy it from Heatercore4u!)
Check it out