I didn't take any contact info from them. Basically I saw them at 3 shops Laser Sound, Jumbo Audio near Panorama Shopping Center and Abdullah Audio or Abdullah Music, something like that. Abdullah Audio/Music quoted 7.5K for Sony, didn't bother to ask others because I was sure it isn't going to fit in my Alto.
Will be taking my car to Laser Sound and the installer will check the space and try to fit that in. He also has shallow subwoofer without box from Pioneer, and will check with his carpenter if a custom made box can solve the problem.
Will let you know in coming week.