paying for it to be done would likely be prohibitively expensive...
have a read of this thread and it'll give you an idea
on how tricky it can be to move to a ZF platform:
https://www.fordxr6turbo.com/forum/topic/30284-ba-to-be-bfed/
all of those sorts of things in the aftermarket only really survive if they're excellent... just go with whatever you think is best value for your application.