Ok. So here is my experience with Tyre Gallery. This Friday, I visited them after office hours just to get some knowledge and discussion. Their address is:
https://www.google.com/maps/place/Tyre+Gallery/@33.7088718,73.0539067,17z/data=!4m12!1m6!3m5!1s0x0:0x9f15be64ac0c6f67!2sTyre+Gallery!8m2!3d33.7088718!4d73.0560954!3m4!1s0x0:0x9f15be64ac0c6f67!8m2!3d33.7088718!4d73.0560954
And as per http://www.prtc.net.pk/images/addresses.jpg , they are the only official and authorized dealers for Bridgestone tires and Lenso rims in the capital. Had a wonderful discussion with the sales person and he guided me to the best possible extent. According to him, only they deal with Lenso rims officially in the Capital, and have the latest products with official warranty and even warranty cards.
The price for latest, decent looking, light weight 15" Lenso rims was 52-55,000 PKR for 04 rims! (Can you believe that?) But he said that some rims were bought previously on old rates, and can be sold on old rates too (and I respect him for his honesty, otherwise, such details are hardly disclosed by the shopkeepers / sales persons).
He also showed me Taiwanese rims, and they were so heavy, that I immediately left them. 15" heavy Taiwanese rims will be a severe, "Zulm-E-Azeem" on 1.0L Vitz. Lenso rims were so light, that their weight can be even compared to the stock, steel rims in Toyota Vitz.
Coming towards 15" tires, he was not sure and said that 185/60/R15 will be comfortable but 185/65/R15 may touch car body (both cases are without spacers / packing). Regarding price, he quoted 11,500 PKR for each tire of Bridgestone Ecopia in 185/65/R15 EP 150 series. He did not had the tires in stock and said that they will have to be ordered with the company (Good thing, fresh and recent tires will be made available, whoever requires them), however, they will have manufacturing in 2018, and not 2019. According to him, those tires, brands and sizes which are more commonly in use (like tires for locally assembled "Market ki Garis") are readily and freshly available, may be with manufacturing in 2019 (if someone is lucky), however for odd sizes, 2019 seems quite difficult.
He also had Yokohama DB tire in 185/65/R15. I do not know whether it was Advan dB V552 or otherwise? Sales person was also not sure, however, it was so soft that you can bend it in any direction easily. He also showed me a Bridgestone tire in 185/60/R15 (or R14, I do not remember exactly), but it was quite hard.
I thanked him for his support and guidance, and left the shop.