Pau,
Welcome to the forum. I will look forward, as I'm sure others will, to stories and, hopefully, photos of your progress. I don't know that eBay should be the first place you look, but my ventures onto the UK eBay site has typically shown that there is a greater selection of "A"s there versus here, on the US site. I think there is some sense that so many BSAs were sent to the US that the selection here would be much better, but I haven't seen evidence of it.
Richard