SLs are not generally the SC frame or build that local shops or even the larger online dealers will carry on hand inventory since the newer models are more in demand.
You'll likely have to place an order for one and expect some lead time.
What are "all" the dealers you been sourcing and what sort of un-straight answers are you getting?
I got a SL 2011, size L, black, Rxc, this january. They do exist buddy! Just be in touch with the SC crew to check availability. My case was to wait a while for Fox parts.