E34 m30 b30 ignition lead advice

Hello.

I'm looking for surgestions for BMW parts suppliers in the UK for my .

1989 E34 520i se
M30 B30 straight 6 engine .

I'm after a new set of ignition leads and rotor arm .

Anyone know of a trusted knowledgeable BMW aftermarket or OEM parts place they have used or recommend in the UK who could contact.

Is anyone using aftermarket lead on there M30 .

I understand the leads have resistors built in to them but I'm not positive, I'm not very mechanical, I just do t want to get the wrong lead set .

Any advice appreciated.