The Karnataka transport people have this Volvo going from BLR to Ooty via Mysore.Pricing I haven't checked lately,Pai Vista is better, its new. SD prince might overshoot your budget a bit.
I don't think there are volvo service to ooty (not sure)most buses which goes to ooty are private ones and its about 150kms, takes 3hrs to 3.5hrs to reach.
My last visit to bandipur was more than 5yrs ago, they don't have jeep/suv safari.
However Jungle lodges n Resorts do. Better check,before booking.
[Jungle Lodges and Resorts Ltd]-[Wildlife and Adventure Ecotourism Destination]