Buy 3 of these for $34.99 ea free Prime shipping. Make a ramp to use 2 on the main wheel and one for the tail.

Those look great. I think I would use some 3/4 plywood scraps to help out the force summer in each scale. Two square scraps for the tail wheel and 2 rectangular scraps to couple the two for the main.

(That's an old trick from the guys at a scale company I did s/w for)