Is there any new object that gives formants for output

Can you be more specific about what you want?

Formants are a spectral feature (a series of resonant filters).
Do you want the spectral envelope to apply to another source?
Do you want a list of the peaks in the spectral envelope?

You can get the spectral envelope of vocal formants in real time with a cepstrum and lifter. This is how my rubberband~ external preserves formants. Then you could do peak analysis to get the formant frequencies.

I think the ftm suite (http://ftm.ircam.fr/) has some tools that may do this ...
gbr.lifter        Cepstral liftering
and
gbr.peaks        Estimate peaks (partials) from a given spectrum (or any other vector)
Estimates frequencies (interpolated and scaled indices) and amplitudes of peaks in an incoming vector.
The estimation of partials in a spectrum works best when a logarthimic amplitude spectrum (positive frequencies) is provided as input.

Simon