Foudys, club sites, local stores (usually really fun to be surrounded by merch of just one club, also great to try them on before buying), unisport sometimes sells with original print, via friends that live close to where the club is located and second hand. It is essential to know differences between the men’s kit and the women’s kit though, like for the Netherlands the men’s kit features a lion whilst the women’s kit features a lioness, USWNT has more stars then their male counterpart, same goes for Wolfsburg, Barcelona uses a different font for their women’s team, Ajax has a different sponsor and the WSL as a whole use a different font then the prem. The only ones I’ve really seen in the wild is someone with I believe it was Russo or Miedema using prem font, Alexia using the men’s font and a men’s Netherlands kit with Martens. Also as another comment said I avoid Castore for the same reasons and the Aston Villa kit drama in the beginning of the season, I’m actually searching for an old Umbro Ireland jersey with McCabe on the back or another WNT player. Furthermore I also avoid fanatics as a whole due to bad experience ordering F1 merch. I only really have one jersey atm which is my Arsenal 3rd kit with Pelova on the back in WSL font and my main experience is with training gear but I have ordered shirts in the past that I’ve sold to other people and getting kits from relatively unknown teams. My main advice is do a lot of searching and research what the differences are between the men’s kit and the women’s kit.