Series 3 Series wiper arm help

I need a LH wiper arm for my series 3 lightweight as the end snapped off mine

Ive looked them up and come up with prc 2620 but these seem to have multi splines instead of the single spline the stub on my wiper motor has and the arm has a straight end in the picture instead of the bent end mine had to hold the wiper blade on

Can you still get the old type held onto the stud with a grub screw ?

Thanks

You can bend the arm, just put it in a vice and put a large adjustable on it and bend. Mine are bent and I could only get straight. You can get adaptors for the arms if you are struggling to find the single screw ones.

Thanks i may need to get an adaptor then