so i have a double(two at the moment actually 
) and a maclaren quest.
i'd like to sell my quest and one of my doubles and get a good single so they can sort of share on short trips
i.e one in the buggy one walking/in the sling.
ideally id be able to get a buggy board on it,it would be small enough to use on busses etc,but have a big enough seat for the 2 yr old and have the rear facing option.
could be a 'from 3 months' one as the newborn is actually nearly 2 month old already!
does this buggy exist?!
how much will it set me back?!
TIA!