@Bister: good to know about dealers. Would be great if it stays that way.
@CJ2Rox: Sherwood shipped the part a couple hours after I called them. All else fails, I would have built my own from some sheet metal. ?
Keeping my fingers crossed that Roxors will sell again in the US and we will have a supply of spares at reasonable prices.
I've gotten pretty used to hunting down parts for my (hobby) vehicles: 35 year old German tractor, 21 year old German motorcycle, 15 year old excavator, and now the Roxor.
It just takes time and passion to get parts. Knowing a shop that can fab is also very useful.
For the motorcycle, eBay has been my "dealer network" for the last +10. For instance, handlebars have a non-standard diameter at the clamp and cost now over $500 from the "stealer". Pretty much if something breaks, a good used part will replace it. I'm currently waiting for some used parts a friend is shipping from Germany.
The tractor has European size tires. The rears costs about $1800 each - if you can find the size in the US - plus tax and freight. A US size costs maybe a third. Changing rims to mount cheaper US sizes is not an option because the bolt pattern will not match. I looked for about a year to find a set of tires at a lower cost.
Just like I said, some time and passion, (and a deep breath to help with the sticker shock ?).