Reddit reviews TAMARIND SEEDLESS ME CHUA, 14oz

If you can find a block of dates, I'd use some of that and rehydrate a chunk of it in some hot water water and bunch of lemon juice (lime would probably work as well, but I think the lemon would be closer to tamarind itself, even though it goes exceptionally well with lime). Then mash it with a fork, or your hands if it's cooled down enough, and squeeze it into a paste and strain to get rid of the fibrous bits.

If you can find a block of tamarind, making the extract is just a matter of rehydrating it like above without the lemon juice. The taste is different and awesome, I used to have trouble finding it and used the method above. Now I make a bunch at a time and just freeze it in an ice-cube tray for later use (usually for pad thai or curries). Dried, it usually looks something like the one linked below. I usually find it in Asian grocery stores, although one of the walmarts around here also has it in its section of ethnic foods
https://www.amazon.com/TAMARIND-SEEDLESS-ME-CHUA-14oz/dp/B07CPCK6H2/ref=sr_1_2_a_it?ie=UTF8&qid=1538174066&sr=8-2&keywords=tamarind+block

Edit: I haven't made vegan Worcestershire sauce though..