Hmmmmm. Zellers is a bit weird sometimes. I tried to purchase these 2 LEGO sets and they were both $68.99 (AAT) and they said it didn't qualify for the BOGO 1/2 discount. However, I went to the upper level of Zellers and the cashier just scanned it and I got the BOGO 1/2 price discount !!! So i guess there might be a bit of confusion.
Ricefields, tbh, I haven't seen a AT-TE ever in Zellers. But the last time i check their availblity via their online site(4 months ago before zellers online shut down), there were 2 republic gunships availble at my local store.
By the way, i do find that ToysRUs and wal-mart has the biggest selection of LEGO. Zellers comes as 3rd as most of their BIG sets are mainly city, agents and other non-licensed themes.