Jim,
Corel has them on their FTP site at ftp://ftp.corel.com/pub/Paradox/PdoxWin/OBJCONVT.EXE.
However, Langley's right; it's probably easier to recreate things from scratch than to use the Object Converters. Remember: Those were written for Paradox 5 and things have changed a *great* deal since then.
The only benefit I could see to using them today would be to try and recover the logic used in your older application. Even then, Paradox for Windows is so very different that using the same logic would probably not give you the best results.
Hope this helps...
-- Lance