It is now possible to use Type1 fonts that come in 2 files (.pfm/.pfb) as well as any single-file font.
You will see an additional file selection control on fonts uploading pages. It makes no difference if you select .PFM or .PFB file first as long as they are uploaded simultaneously.
Single file fonts can be uploaded using either of the controls. Uploading 2 single file fonts at the same time may generate an error.