Benny from Levittown Ford Parts is very active on the Ranger5g.com forum.
Join and send him a PM, when asked he will usually send you a code which will cover the cost of shipping.
I used the midsized Yakima RTT during a 2 month trip last summer and fall.
Plenty of pros and cons on either.
so I will just offer a little bit of advice I found when looking for the middle of the night relief.
Research serious hiker sites and you will find those folks who hike year 'round...