It can be replaced with a RCexl or RCXP ignition but is not a direct bolt on replacement.

Option one is to file the flat spot where the original sensor mounts round like the rest of the front case and use a universal timing clamp located in the link below, total cost $57.00 plus $6.50 shipping.
http://www.rcextremepower.net/ignitions.html

Option two is I can make a custom pickup for it, Install and time the engine for $70.00 but you have to send me the engine. Cost is $80.00 plus return shipping.

option three is if it is a one magnet prop hub you can install a new magnet and use the existing mounting screw holes.

All my ignitions carry a two year warranty.

Milton