I think you would be very lucky indeed to find a suitable "adapter kit" that really fits your setup without needing any modifying.
What you basically need are a front axle that fits your forks and a spacer of the right dimensions to position your wheel centrally in the forks - not that hard to do if you have access to a lathe.
Show pictures of the parts you have with the relevant dimensions and it will be much easier to determine what needs to be done
Cheers
Andy