Seamstress(s) for sewing large flags

I am a new company looking for a seamstress or group of seamstresses to sew a small range of multi-coloured flags to fit on poles. These flags will be used at festivals, weddings, parties etc and made from a silky satin polyester mix.

I have attached mock-ups of the 4 flag shapes we are looking to make plus bunting.

I am looking for a long-term ongoing agreement, and will be looking to increase the range of flags within time.

I am based in London but happy to travel to you with fabrics etc.
I am happy to provide any more information you need, thank you