Driving with only driver side wiper is not a good idea because when you turn left, you're blinded until your turn is complete or you could end up in OPEN GUTTER or worse hit a pedestrian/cyclist :o
I went to the place you mention four times with no luck 
Talked to Janjua Autos and he said, "acha try kr k dekhein ge, Fri-Sat-Sunday k ilawa chakar lagao" which means I have to take off from office and still no guarantee it'll resolve.
Someone told me that it could be locally made because it's just the rods, other say that I may import it from Indonesia, England or Australia but I don't know someone living in these countries and can't trust online purchase.