As far as I know, not directly from Adobe... so check a vendor like Amazon
This is not Adobe. Rather user to user forum. Adobe direct is involved in the sale of latest version which is version 13 as a download.
However you can explore online authorized resellers of Premiere Elements 12 who probably have Premiere Elements 12 still in stock.
Have you tried places like Amazon?
Please let us know if that is the information that you sought.
I have tried looking at many retailers (Amazon, Staples, TigerDirect, etc.) and they have all discontinued it here in Canada or the price has been wildly driven up.
Just a word of caution if you need to make a decision on purchase from other than an authorized reseller...
Please review the Adobe transfer of license involved
We hope that you will be able to find the product at a reasonable price (sale) at one of these retailers.