Maybe the sidewinder mounts on the F-22 will help as they are pointed at a downward angle.
[L_IRMBay]
SystemType=WEAPON_STATION
StationID=5
StationGroupID=3
StationType=INTERNAL
AttachmentPosition=-1.347,3.902,-0.116
AttachmentAngles=-3.5,0.0,0.0
MissileRollAngle=45.0
NumWeapons=1
AttachmentPosition001=-1.347,3.902,-0.116
LoadLimit=230.00
DiameterLimit=0.2
LengthLimit=3.655
AllowedWeaponClass=IRM
AttachmentType=NATO,USAF
MovingPylon=TRUE
RotatingPylon=FALSE
ModelNodeName=Left_Rail
AutomaticDoors=TRUE
BombBayAnimationID=7
BombBayOpenTime=0.50
BombBayCloseTime=0.50
[R_IRMBay]
SystemType=WEAPON_STATION
StationID=6
StationGroupID=3
StationType=INTERNAL
AttachmentPosition=1.407,3.902,-0.121
AttachmentAngles=3.5,0.0,0.0
MissileRollAngle=45.0
NumWeapons=1
AttachmentPosition001=1.407,3.902,-0.121
LoadLimit=230.00
DiameterLimit=0.2
LengthLimit=3.655
AllowedWeaponClass=IRM
AttachmentType=NATO,USAF
MovingPylon=TRUE
RotatingPylon=FALSE
ModelNodeName=Right_Rail
AutomaticDoors=TRUE
BombBayAnimationID=8
BombBayOpenTime=0.50
BombBayCloseTime=0.50