You are in KHI. Goto Jameel autoes and meet Irshad. He will help as @capsat got his old corolla converted from them some time back.
as for the seats, goto shershah in the gali where car are butchered. There are always cars like these ready to be butchered. find a good one and make a deal.
Whats with the current seats. Are they not properly fitted or too big. if these are fitted properly and doesnt mingle with height, gear, handbrake then use these as it is.
Waisey the seats are looking fine. Just get them upholstered, these will be better than the old ones.