Hey,
if you are into some DIY stuff, then you could buy the socket and solder it in yourself. It is a small piece which costs only a few pennies. But of course this would mean that you should know what you are doing and are experienced in working with small electronic components.
Blackmagic themself will most likely replace the whole front SDI board. The part itself is around 100€ if I remember correctly plus 50-100€ for labour. So, a lot of money for a simple 5 cent 2,5mm socket.
best regards,
Florian