Ducts for high CFM 120mm Fans?

I am in need of some kind of 45, 90 degree duct for 120mm fans.

Something like:


but more compact (but still a full 45 or 90 degree turn) and for fans.

i been looking and can only find 80mm, but not for 120s....

Anyone know what i am looking for and where i can get it?

still have not found what i am looking for pre made but i think i might of found a way to do this if i make it myself.

Using these 4" elbow fittings:


And getting a sheet of 1/4" PVC:


Cutting the sheet to the size of a 120mm mounting plate and then cutting a 4.5" (or so) hole and then plastic cold welding it to the ends of the fitting, i will have a 90 degree elbow for 120mm Fans..

Anyways, if anyone knows of a pre made version of this, let me know, but i believe this is what i will end up doing if i dont find one i can just buy.

Thanks anyways