No, no srv's yet, and I expect not to see any as they were designed as an armed vehicle like the LRPV which has already been confirmed will not be auctioned.
Yes, the RFSV pictured is very different from the SRV one indeed!
The RFSV Spare wheel mount in the door opening was a fixed unit requested by the Pilbara Regiment who were the only authorised users. They designed the prototype and submitted it for approval to defence, that went to LR who approved it and produced it with a few minor changes.
The SRV mount is completely different and is essence a special door frame rather than fixed mount as with the RFSV one.