Scott , you could get fulda crossforce from carson I got my last set from
http://www.afv-model.com/ which with shipping was cheeper than PMD . rc4wd has a couple different treads . you also can take the stock tires and cut cross ways with a scroll saw or band saw lot of guys do that .I'm sure someone will tell you how with pics if you want .
IHSteve
direct link to tire
http://www.afv-model.com/4711shop/pr...rain-tire.html