Hi Chony
Here is one site that has a selection of drums, http://www.tradebit.com/tagworld.php/drum+snares and there are many more.
Just type “wav snare samples” (Minus the quotation marks) into Google search


HI Al
Most drum samplers/computers/arrangers etc. Have a Humanizer function in them (Even my Wersi Alpha from the early 80s had it) that varies when the drums are hit, just like that occurs when a real drummer plays. (If they didn’t they would sound very regimented)

If you use VSTi this function can be set up to suit the user

Bill