Where can i buy reverse side decals
 

and not the ones on ebay (wrong size)

Shorty,

I may get flamed for suggesting this - BUT - the last time I checked, AA (***********) advertises the REVERSE side decals and -I think- they are replica's of the factory/dealer originals ( not like the ones on ebay ). Last year when I was shopping, they had them for around $26.

If you have, or can get, the artwork, take it to a vynal sign shop.

'Vector-based' file would be best. Like .EPS.

They have hundreds of colors! A plotter, like 2D CNC, can cut perfect outlines. Good source for autoX numbers too.

Negative Side Decals
 

Shorty,

You could try searchong on eBay for "The Real Decal Store"
He sells both positive and negative PORSCHE decals in
various colors.

Out of curiosity, did you buy your car on eBay, from a
seller in Ohio?