Here's an email that I received from Kowal:
Dear Mr. Elphick,
I am writing to you to let you know about upcoming release of new CD with music by Mieczyslaw Weinberg. I am double bass player from Poland and my debut album featuring Weinberg's Double Bass Sonata op. 108 will be available soon. I hope you will find it interesting. As far as I know, there are only three recordings of this composition until now. I hope you will enjoy my interpretation of this piece, as well as other works included on the CD, which are world premiere recordings of bass music
by Katarzyna Brochocka.
The international distributor of this CD is Naxos, and the dates of the release are as follows:
Germany, June 26, 2015
UK, June 29, 2015
USA, Japan etc. July 10, 2015
Booklet of this album contains the liner notes written by Peter Askim. Texts are in Polish and English.
Needless to say, I look forward to hearing this new recording of Weinberg's work.