These flat front slacks come in modern fit. They are available as part of a suit separate package. The matching jacket and vest are available separately in any size you need here:

Matching Notch Tuxedo Jacket

Matching Peak Tuxedo Jacket

Matching Shawl Tuxedo Jacket

Matching Notch Tuxedo Jacket With Black Lapel

Matching Peak Tuxedo Jacket With Black Lapel

Matching Shawl Tuxedo Jacket With Black Lapel

Matching Vest