We have a TransK9, for the two girls. Don't use the divider as it gives them more room.
I also looked at Variocage, by MIMsafe. But did not like the look of it.
We may be a bit different though as cost played a big factor. Nothing here of any quality related to dog crates for cars exist only one I found was about $3000 that was Variocage
@Xena Dog Princess from memory they did not want to get involved in the export part, so I had to do that my self. Because of that no VAT (GST) refunded. But they gave me free products equivalent to the GST instead. I had a quote for shipping and all up paid about $2000ish.
Having it now would not go without, as especially when we are 4wd driving. Girls are settled and they feel secure as can't be moved or bounced around.
And one extra benefit it is amazing how clean the rest of the car is.