How to identify rims so that I can find replacements for my haywagon?

In the tall brush of my property was a decent condition Minnesota running gear.
A couple of the rims are rusted thru and I'd like to find replacement ones but don't know where to start.

Attached are photos of a couple of the rims and a picture of the model/serial of the Minnesota running gear, and tire.

I believe they are 15" rims...
They are 5-bolt pattern.
The spacing between each bolt is 3.25", approximately.

Tires say "P205 / 75R15"

Any one know how to help me find the proper terminology so I can go to a junk yard and find replacements?

Thanks,

Measure from center of bolt to center of the second bolt. That in inches is the size. If it's 4.5" then the term is 5 x 4.5. 5 being number of holes.  4.5 being the distance.

If I understand you right, its 3.25"
(See attached illustration)

Is there a measurement for the width of the rim, if viewing from the front- the distance between the two edges?

No. Skip one. I said second bolt, but meant second bolt after the first. Hope that makes sense.

Wayne means to measure the diameter of the bolt circle. As in this pic. You'll need to know the diameter of the rim( 15", from the R15 on tire) , width, (probably 6 but check) and offset. Lay the rim on the ground, measure up to the flat part where the bolts would touch the axle.

Based on Roy's measurement points, the distance is 5.5" (5 1/2").