I finally decided to maintain the birds on a four part diet. We make a fresh, pollen based dry diet. This is in a dish at all times. I investigated several nectar formulas. They all call for laboriously mashing fruit and mixing it with water and corn syrup.
Supermarkets have, for human consumption, fruit nectars with the same ingredients.
These nectars come in small, easily opened cans. The birds have this nectar before them constantly. I experimented with several fruit varieties. These Lories prefer pear, peach and apricot nectars. I am using Goya brand.