Keep us posted.  I'm looking too.  Also - I squirted green slime into my tires as a preventative measure in lieu of not having a spare tube.  About $8 for a large bottle of the stuff at walmart.  I have no experience with slime but I figure its better than nothing.  See pictures

slime01.jpg

Please note: walmart sells 2 types: for bicycles and for dirt bikes.  As far as I can tell they are identical products with slightly different labels.  The dirt bike bottle was $1.50 cheaper!

slime02.jpg

I've had my radwagon 4 for about a month and I love it.  But the first problem appeared: the kickstand spring broke.  I checked on the springs and I see the problem is they are too "weak" for this particular usage.  Here is a picture of the spring that broke off (I was unable to find the 2nd spring, assuming it also broke in the same way):
rad003a.jpeg
As you can see the spring end "stretched" to the point of not hooking, and then popped off while I was riding.


The spring measures 1/2" diameter by 3" long.  See pics:
rad100a.jpeg
rad101a.jpeg


My thinking is that the 1/2" spring is too weak.  I went to the hardware store and purchased a couple of 3/4" x 3" springs, approx $2-3 each.  I put them on the kickstand and it appears to work OK.  I'm keeping my fingers crossed that these much stronger springs will do the job.  Pics: (sorry was unable to get a good angle on these replacement springs)
rad102a.jpeg
rad104a.jpeg


Also a suggestion, keep a spare bungee cord with.  I was able to continue riding my bike after losing the springs by bungee-ing up the kickstand.  See pic:
rad002a.jpeg