Yes NA SW20 axles will fit your MK1 hubs without any fabrication or mods, completely plug and play.
I've actually gone a step further on my builds and used a SW20 left axle on the left side, and a Celica St202 supported shaft on the right with another left SW20 axle attached to that, made a simple axle carrier bracket on the V6 and that gave me an equal length shaft setup.
Note you cannot use a complete St202 right axle as it is too long.