I believe that you should have the car or aspire to have the car to post in general - neither of which applies to me.
it would be a shame to see ya go mate, you still have a mass wealth of knowledge on the Z
Best thing to do is to get a BT adapter. You can get them fromm Holdcroft or Mr.F @ MJP. Both have them in stock at the mo but have limited amounts and are selling quick
The Blue Tooth adapter is £99 inc p&p with forum discount. You will need to PM a admin/mod to get the relevant discount code depending on where you choose to buy it from.
Instructions in the car manual tell you how to set it up. It takes 5 seconds to install the adapter which will work with your steering wheel controls.