Guys,
You are not limited to Motec or Rasant supplied sensors. Your Motec and any other aftermarket ECU for that matter will run successfully using any suitable quality sensors of which there are many to choose from. For example I use a Clewett crank sensor and cam position sensor for my Motec M130.
https://www.clewett.com/index.php?main_page=index&cPath=5_29
Todd, Haltech make a lot of stuff locally that may interest you for your Motec setup.
https://www.haltech.com/product-category/inputs-and-can-expansion-products/pickups-triggers/
It's unlikely your Hall effect sensor is faulty unless it has been powered up incorrectly, I suspect it's just a minor wiring issue. If you live around Newcastle I can personally recommend a tuner who would sort your problem out quick smart.
Consequently there is no point panicking about Rasant's closure as there are plenty of other sources of parts, good advice and alternative aftermarket support for the EFI conversions Andrew has sold you.
I agree it's a pity Rasant has closed as Andrew has certainly been an inspiration to me.