Water only tenders are usually called 'Canteens', although 'condensing tenders', which collected water from the engine instead of letting it get wasted are another type, but they are usually only found in desert climates, where water is considerably more difficult to supply. Canteen tenders were not that common either, since water troughs and filling towers were fairly frequent on most railways, but Norfolk and Western used canteen tenders with their 2-8-8-2 locos in order to alleviate the need for heavy coal trains to stop in order to replenish their water supply, since on steep gradients, such trains might not have been able to actually get going again from a complete standstill with a lot of coal wagons in tow.
I should think if there is a freebie, typing canteen in the content manager would locate one if such a thing has been made.
Al