you could get another male, but to be honest, she will probably fight with both of them
Do you want to breed or just keep them as pets?
I had the same issue and swapped my female for a male, my two males get along really really well and I have never regretted my decision!

I got the female of a friend who breeds budgies, so no hassles for me to swap them really.
I am obviously not sure if you are in the fortunate position to do the same

Perhaps advertise the female and sell her to a good home and find a good local breeder for your new male or ask one of your local breeders if they are interested in your female and are willing to swap.....
Good luck