I already have a current bottling of this but the liquor store I'm going to tomorrow still has some in stock.

Is this hard to find right now? Will it be around for a little while? If it is already becomming scare I might pickup a spare but this is what I have on my mind right now and money is a bit tight:

Pappy Van Winkle 20 (to be saved until my son turns 21 - 21 years from now!)
Evan Williams 1783
Heaven Hill 10 YO (What do you guys think about this?)
Old Rip Van Winkle 10yr 107
Old Weller 107
Wild Turkey Rye 101