If you want Ohlins shocks, give Dan Kyle a call. He is the largest distributor of Ohlins in the USA, and very very knowledgeable.
I am an Ohlins dealer, and I can't beat Dan's pricing.
http://www.kyleusa.com/
Other very good options include Penske, and Bitubo which can be had from
Traxxion Dynamics.
I will warn you that as soon as you get a really good set of shocks on the rear of a R3, you will find just how bad the forks are, and will start looking for a real cartridge assembly.