[Tugindia] devnag font

[Sarada Seshadri]

Hi all:

I'm working on my first tex document in devnagari. I find that
I'm not able to go beyond font size 12pt with the devnag package
and the associated font files. Could anyone please point out to me
how I can get bigger font size; any new files required or any
possible scaling?

Thanks very much.
Best regards. 
-Sarada

PS: Following are the font files I have:
    
    dvng10.1037pk
    dvng10.600pk
    dvng10.657pk
    dvng10.720pk
    dvng10.mf
    dvng10.tfm