I think now the GOVT has banned the custom licence plates..
you can have only 3 digit #plates now...
but still there are vehicles running on roads with custom plates... like
Lawyer 1/ Sohan 1/ Rose 1/ Jutt # 1/etc..
but they are very costly....
may be more than auctioned number plates...like 01-99/786/111/420/007 etc..
I think you should give a visit to Vehicle Rigistration Authority of your local area/city/town. they can give you the info..