Mobililtyscootersdirect.com have a huge selection of 4 wheel scooters with basket: options such as movable seat, width of seat tilting stearing columns, movable side armrests etc.
This web site has useful videos on what to consider before a purchase. The sites advertise no taxes /no shipping charges, which might only be for US deliveries but certainly worth negotiating. I will certainly contribute when I get down Jan 1st