Hubl's is one of those artifacts from LONG LONG AGO that can be amended for the images we make today, There isn't any reason to mix a paste, unless you are traveling through 1905 Europe and want to develop film in your rail car or hotel and don't want to mix a developer at room temperature from powder. By the '20s, folks were generally using the same proportions but making a more wieldy solution. There were slight variations in proportion, and Sodium Carbonate was substituted readily.

A common version from the late 1930's was usually called 'Glycin-Carbonate for Slow Tank Development"
This version from Ed. Lowe, 1939

Sulfite 15 grams
Glycin 60 grams
Sod. Carb. anhy 15
Water, to 2 liters

Dilute 1 to 10.

Another formula from the same time that Lowe mentions is by LM Condax, for color sep negs.

Water 1 liter
Sulfite 50 grams
Glycin 9 grams
Kodalk 40 grams.

Then, there is the ultimate glycin developer, Crawley's FX-2.

But these, and several more, all cousins of the old Hubl paste.