just wondering if there are lift kits out there for a 3rd gen wagon or if not is there a way to raise the ride height?

How much higher do you want to go and why? You can get higher springs (may need to get them custom made as I don't think King Springs do the raised springs anymore) if you want to just go up a little bit (1-2 inches).

just had a look at there complete parts list catalogue all the way back to the year 2000 they've never made them for a magna only lowered and standards, might need to look into Monroe max air adjustable shocks but there pretty pricey

Try Dobinsons springs

I think Lovells may also have made raised height springs. K-Mac I believe can make custom springs.