Hello, I currently have a very mature Honeycrisp tree (planted in 1992). I now need a pollinator for it. I am unsure of which one to use because most trees I search out are zoned for zone4+. Supposedly, we're in zone 4B (i think that's a bit optimistic). I'd like to enjoy the fruit off the pollinator as well as the Honeycrisp. Availability of trees is a concern of mine - I go local when I can but alson drive down to Gerten's. I was thinking Triumph Kudo's, Snow Sweet ... None of which are as temp hardy as HC, unless I'm missing something. What do you recommend for my needs? Thank you.