i too, hope the vendors can address this and shed some light.. i have had
my share of failed coolant bottles over the years.. the plastic simply cant
take  the heat and warps and splits

In a message dated 3/18/2017 2:16:17 P.M. Eastern Daylight Time,
jim.felder@GMAIL.COM writes:

Who  sells tanks that are not made like milk cartons? Who sells blue caps
that  actually work in both directions like the originals? Can I still go to
the  dealer and get these items or are they NLA. At this point I don't care
how  much either of these parts cost, I just want them to work. I don't want
a  stainless steel tank because a) they don't make one to fit the  upgraded
diesel hoses, and b) seeing the reaction of the level inside the  clear
plastic tank in response to rpm, observing bubbles, etc. is an  important
diagnostic feature I don't want to  lose.