\input fontinst.sty

\generalpltomtx{cmr5}{cmr5;1}{pl}{OT1}
\generalpltomtx{padr9d}{padr9d;1}{vpl}{}
\generalpltomtx{padr9d}{padr9d;2}{vpl}{OT1}

\transformfont{cmr5;2}{\fromplgivenetx{cmr5}{OT1}}
\transformfont{padr9d;3}{\fromvpl{padr9d}}
\transformfont{padr9d;4}{\fromvplgivenetx{padr9d}{OT1}}

\bye