I recently purchased some Telefunken E88CC (6922 variant) from Upscale Audio to put in my Symphonic Line pre-amp. My review of them on the Upscale site is here (second review, dated Oct. 10, 2014):
http://www.upscaleaudio.com/telefunken-e88cc-6922/#ProductReviews
http://www.upscaleaudio.com/telefunken-e88cc-6922/#ProductReviews