Viggens came with 17x 7.5 (Alu34) - Viggen 5 spoke.
Some 9-3's in 2001 came with 17x7 (Alu36) - Double 'Y'.
So 17 x 7.5 should fit fine.
Depends on what tyres you are looking for also, as your favourite might only be available in 7.5 widths.
Best of luck.