Steering Wheel PCD question.

[Markeo]

Evening all, my GBS zero has a quite small steering wheel (circa 280mm) and I'd like to try a larger one. However the PCD of the steering wheel appears to be 101mm (6 bolt) , and pretty much all new steering wheels are 70mm so I can't find many to choose from. 

Is 101mm an old standard?  I'm pretty sure my car has a sierra column, so am I best of getting a new boss for the that fits 70mm wheels? 

[magh]

I purchased an adaptor ring for mine to run a quick release with my old mountney. 
 

it wasn’t cheap but a brilliantly made product from bg racing and gives lots of options.