I was thinking in the mean time I take the coil from the credit knocker as it is the same value. Can I just disconnect the wires from that?

LOL- this is the main reason why credit knocker coils are missing!

Yes.. go ahead and swap it out, just do the same to the wires as you did before.

You can replace the coil with a Williams 26 - 1200

Greg at RTBB will look after you as he does me

heres the link

http://www.rtbb.com.au/catalog/product_info.php?cPath=170_61_179&products_id=402&osCsid=3915f909e13d42974c1d145fc29fa8cd