Bro trust me, do not ever fall into the claims of the dealer salesmen. It'll be an absolutely horrible experience for you. There is no way they can get you a car under the official time given by atlas. They're all lies by salesmen and dealers to meet their targets. Take my suggestion, try to find some desperate 1.2 seller and buy on around 50k own and pay 100k extra for registration. Otherwise if you book, by the time you'll get the car, you'd have to pay a lot more than the 150k as the way paks economy is going, city 1.2 may actually end up being 200k+ more expensive by the time you get it. So you'd pay less right now and get it instantly. Usd is predicted to go to 200rs in a few months.
If you cannot afford anything extra over the current price, then either keep your current car or look for something used in your range.