I have backhoe and bought JD wheel spacers on ebay for about 1/2 the price of JD wanted.
Not sure which chains JD was talking to you about but the ones for a 425 ,suppose to be there heavy duty chain was more than 3/4 of the way worn out at the end of 3 or 4 winters.
So when I bought my 2210 I made my chains from widest vbar tire chairs for 1/2 pickup. 15 or 16" tires
took one end of hook off side rail ,plus hook off the cross link. then clamped the vbars together and then welded top and bottom of links..
I have used them going on 6 or 7 winters no links broken and holding up very well. Doing 8-12 driveways and church parking lot for all that time and a distance of close to 1/2 miles sometimes 2 times a day...