The factory removable tops will be a little rough because of their age at this point, but there is a company that started making new ones in full size and sport style. The tops are made by
Truck Hardtops and Jeep Hardtop Accessories from Rally Tops 4x4 Sport Utility Hard Tops and they are nice.
The coil suspension never made it to the USA as a factory component, but there are companies that make coil kits for them. The bad part (for your need) is that the coil kits are built mainly for high articulation for off road trail crawling.
If you find a late model Samurai (1990-95) then you will have factory EFI.