certificate – How to generate pfx file from spc?

We purchased a certficate from godaddy.

We need to generate pfx file from the spc file provided.

For that last time we used the process provided in this link.

But, it should be done from the same machine where the certificate request is generated.

That machine is not available now.
I tried to use the process on build machine, but the options are greyed out.

Options in mmc greyed out