"I had a look at CAPT but it seems they also run their brush up courses for two weeks, similar to BGS. "
"two weeks is simply too long for me. "
You simply are not going to get it in less than two weeks - you have to do 65 hours in the classroom (minimum) and there are duty hours regulations to abide by - 6 hours per day. That's just over more than 10 working days.