Okie after looking at this great web page, the rim tape section was a bit confusing please help me out on getting the lightest rim tape on the market, along with the most durable tubes with lightest weight.

Could be wrong but here goes - Ritchey WCS rim tape at 5g but I can't find any for sale, Cambria bike has Rox rim tape for sale can't remember the weight but its light.
As for tubes I just bought some Conti Supersonic claimed weight 100g mine weighed in at 98g woohoo 2g saving no idea on performance yet I'm awaiting on my wheels.