I would love to hear your experiences - and it would also be good to know what part of the country you're in. It will be interesting to see if any particular parts of the country come out best for having schools/colleges that offer some leeway when it comes to the taking of A levels for those who have been home educated.
My ds took 4 IGCSE's this summer, and came away with an A*, A and 2 B's. Granted, he doesn't have the minimum 5 - 6 GCSE's that is required for a student wanting to take A levels. However, he does have the grades for the A'levels he wants to study - namely English Language and Maths. He wants to take Art, but couldn't take it at GCSE due to the coursework component - so has to make do with his portfolio of work as proof of his ability.
So far,we've been unable to find a school or College that will let him take A'levels;they all seem to want him to do a load of GCSE's - which to my mind is a waste of time, given that my ds has passes in the core subjects. Ideally, he'd like to sit at least a further 2 GCSE's. He doesn't want to go to the likes of Oxford or Cambridge, so a total of 6 GCSE's will be more than sufficient.
We live in North London. So, like I said, I'd be very interested to hear what your findings have been, or perhaps like me, you're going through this now for the first time.