How much more spacing do they need!!!??

Perhaps get some 10-15mm hubcentric spacers instead if you can still get clearance on the arches with these on.

Surely the studs arent going to be an issue because if you get longer ones the larger spacers will take up the difference so the end of the stud wont vary - unless of course you get 10mm larger studs & 5mm spacers!??

Also I believe that you need to get 6-7 full turns on the wheel bolts when tightening as a safe guide if this helps you?