The latest update on the Blanik America site is October 2016 but it seems hopeful:

http://home.nwi.net/~blanikam/ba/news.htm

I live in Canada where the AD&C modification is already approved but the expense of the work coupled with the 5000 hour airframe limit seems to have resulted in few L-13's being made airworthy again. A really nice, very low time L-13 might be an economically viable project though. Personally if I had the time and money to do it I probably would, just as a labor of love. I have a special place in my heart for the L-13, sorely miss flying them and it was a sad day when my club sold our last one. The L-23 we still have is a fine glider but it just doesn't have the same appeal for me.