If you can't get the K60, try the Mitas E07. I just put one on my Tiger to try out this year. I ordered the Dakar version and that is one STIFF sidewall. Not trying to hijack, just offering alternative if K60s sell out. I got if for just under $200 shipped from MX1Canada. I don't know off hand, but I think the K60 is cheaper. Unfortunately there is no American distributor for these.
"I refuse to tiptoe through life only to arrive safely at death" '13 Tiger 800XC, '14 Street Triple, '00 KLR 650(finished project), and 2010 Honda NT700V wife's.