Hi i am in desperate need of help....

I have a 98 civic hatch cx with a b20 swap and noticed i need new motor mounts. Upon changing them, i noticed that the driver side transmission motor mount fit perfect, but the passenger side was off. I ordered mounts for a 98 civic hatch. Well my question is...
Why do you think the owner probably changed the bracket where the mount goes?
What other mounts might fit?
Please help, my car is currently running with a missing mount!

in order to put the b20 inthe ek, he had to put in some different mounts in order to bolt the engine in.

the mounts he used were sourced from an em1.

engine driver side bracket, rear tranny L bracket, front lower tranny mount (same for all b series). p7j or the the p54 can be used with the d series ac compressor.