After further research ror the pi 3b+, there doesn't seem to be any repository for QT3 on Stretch (and future releases). It is possible to get Jessie to run on the pi 3b+, but it requires installing on a pi 3b then updating and upgrading. Then you also need to install the drivers for the wifi. After that, it should work on 3b+.

I only have 32gb cards (and larger). I may be able to upload an image somewhere. My concern is the future. Unless we can get SEQ update to QT4 or 5, newer PIs wont work and in the future, only older distros will be compatible.