need help with wheel spacer size pls

hi ive got a mk1 golf gti cabby and just bought some bk racing 17 inch alloys for it, the rears seem to fit fine but the fronts are touching the callipers and very close to the struts, what size wheel spacers do i need to look for and does anyone have any for sale

Hold the rim up so it is very colse (2mm) to the caliper and the look at the distance betweent the hum and the rim where the bolts go thru.  Measure the gap, prob bout 10mm.  Get on ebay and search for 4x100 and 10mm (if the gap is 10mm) wheel spacer.

http://www.ebay.co.uk/itm/wheel-spacers-4x100-5x100-10mm-aluminium-/250871329642?pt=LH_DefaultDomain_3&hash=item3a6918b36a