That tool Exit1965 posted seems like it may be the ticket. Price is right and it reads in 1/8 degree increments.

I used the speedway motors one on my car, a tape, to do the toe and some admittedly single use ceramic tiles for turn plates. So far so good. I ordered some $150 turn plates which should help make that easier in future uses. My old wheels worked well with the center caps removed with that gauge. Any set of stock wheels would work fine. Drives really nice.

From the videos mentioned above, sprinkling a little salt between cheap linoleum tiles works plenty good for turn plates.