Freelance Seamtress (TW7/NW5 area)

We are a small start up company looking to produce a small run (50 - 100 units) of baby/children's leggings (age range 0m - 6yrs). We would have the garments ready cut. We require them to be sewn together to a high retail standard and with all inside seams to be overlocked and our label sewn in. Preferably no further than 2 miles from either NW5 or TW7 to make collection and drop off easier. Payment can be made per garment or per hour, but we would like to know realistically how many you can achieve hourly.