Purchased my first wakeboard boat in Oct, picked up in Feb ... 2014 Mojo with flow surf. Awesome wake for wake boarding ... Huge air!!!

Stock ballast wasn't working for surfing and just installed wakemakers 650 IBS. It made a Huge difference and I was able to go wireless today! However, still need a larger wave and wanted to upgrade the 650 rears to either 900's or 1100's. Problem is I only see 750's listed for 2014 Mojo? Any advice? Also, I guess there's a discount code out there with wakemakers, appreciate any help with that info as well.