a "cup" is 250ml in our measurements.
Try your local £1 shop, they had sets of all cups and measuring spoons in funky neon colours last week. Or if stuck, use a measuring jug in the interim.
You can find "weight" carb coverters and I know that the newest version of Atkins for the UK had the grams in the allowable salad lists. I think the allowable salads was like 230- 340g a day of certain veggies.