Well, you could always learn the theory by self study, organise to sit the exams in a single sitting in a UK ATO who has agreed to let you sit the exams there, and then you have all passes in your groundschool exams as you require....
There are also groundschool session by some ATO, which you may be interested in!
But perhaps a more interesting question - it will take considerable time for you to get your PPL. You won't be able to do all 45 hours in a week or two! The shortest courses I have seen are "intensive" courses in the USA and they still require a minimum of 1 month (which not all are able to satisfy). You will undoubtably have ample time to fit in groundschool / time to complete whichever requirement that they have laid out for you....
Anyway... just a thought!