Nosler still makes the Custom Comps, but they now also offer a new line of LR (high BC) target bullets called the RDF. They also offer them in a 6.5mm 140 grain, the price is slightly higher, but the BC is MUCH higher. The CC 140 has a .529 G1 BC, and the RDF 140 has a .658 G1 BC.
I don't know if this is what's happening, but they might be gravitating more towards the RDF line, because of it's recent popularity boom (higher BC, longer range shooting). I have noticed that you can't really find any of the Nosler CC 6.5mm 123 grain bullets anywhere anymore either. I have 2,000 of them I got super cheap (almost 2 for 1 pricing) that I got for my 6.5 Grendel. The CC 123 was designed specifically for the Grendel AR cartridge, even though it can be used in any 6.5mm.