You can buy fuel pump and fuel safe piping from auto shops around G-8, G-10, Hathi Chowk, Babu Mohalla, Marir chowk areas or any car spare parts shop (brand new). Make sure pipes are fuel safe or else they will dissolve. If you have any favored auto shop, you can ask them too. You can even explore motorcycle fuel pumps. Take care to use good quality parts of Honda or Toyota. For Suzuki parts, only go for those used for Wagon-R, Celerio (Cultus), etc and not old obsolete junk models. Make sure to get an inline diode and switch installed to the fuel pump wiring and suitable large jaw alligator clips to attach it to battery.
Use a thicker wall diameter pipe (made of rubber, etc) so that it doesn’t easily turn around on slightest path obstruction. Else, get a jacket pipe made of metal with fuel pump nozzle like bend but that would be expensive.
That is tedious process which you are currently following.