Morris Minor Owners Club

For those who have installed or know about this conversion.
I have a Sierra box but am trying to source the parts necessary for the installation.
Can anybody help me with tracking the company who makes or sells these kits ? Also any knowledge on where I can find technical advise on the installation itself.
Really need help urgently ..... thank you, Derek

Derek, will this box be mated to the minor engine? 1098 or 1275? or something different.

Sorry, I should have said ... 1275 in a 1960.

Most of the usual minor parts suppliers should be able to help
& there is also Frontline Spridget who do the conversions