I have heard that they are building the Taichung Costco now. It’s going to be off WenXin South Road. There is also a little shop called 101 supermarket (check compass for location, they moved recently) which gets things from Costco. You can ask them to order what you want. Also, if you have a Costco membership, I have heard they deliver to Taichung if you order through their catalogue. I haven’t tried this to confirm the details, but two other people in our animals group have done it. I know it’s possible, just not sure what amounts and membership requirements are. The garden/veggie burgers I have seen here at supermarkets have been a disappointment, so I wouldn’t recommend even searching for them.