Anything European.... Mauser, Merkel, Sako, Tikka, Sauer, Verney, Zastava, CZ, Schultz & Larsen, Sabbati, Bergara, Walther, Anschutz, etc... every gun maker in Europe makes something in 6.5x55, it's a looong list.
North America...Ruger, Cooper, Remington, Winchester, Howa, just to name a couple, I'm sure there are more.
Used market BSA, HVA, Parker Hale, CG, Zoli, Voere, BRNO, Heym, Lakelander, Krico, Varberger, few million 38/96 spotters, and thousands of target CG63etc and S&L M69's.
Really, like where could I ever get one? I have an old BSA CF2 in 6.5x55 that cost me a whopping $450 and it shoots better then Chuck's 6.5CM custom...no offense to Chuck or his rifle I'm sure it will settle in.
Brass, I use Norma, $60/100 for 1F from Tradex.