Rekluse Core EXP 3.0

[Weekend Warrior]

Hi Guys,
I'm new to the forum and need to get some advice on the Rekluse Core EXP 3.0 clutch. I have a 2011 ec450fsr. I have been doing some research on the Rekluse clutch and have been trying to work out which model will fit my bike. Some of the resellers state that the rms-7700 will fit, another says the rms-7773 will fit, so I contacted Rekluse who say they don't have one to fit my bike at all! They weren't exactly helpful and didn't give me any reason why, but surely there is a model that would fit! I don't know if that is purely because they have not tried to put one in my model/year bike and therefore don't list it as an option, or if GasGas put a totally different clutch in the 2011 model compared to every other model, which I find hard to believe.
Is there anyone out there that has put one in the 2011 ec450fsr, or anyone that could give me some help?
Thanks heaps,
Michael