Can you buy short queen sheet sets with deep pockets? We have a foam topper on our short queen bed in the camper so now our sheets don't fit. Once you stretch the sheet around 3 corners, the last is to tight, with our present sheets. I woke up in the camper the other day & my corner was out of place & under my pillow. Where? can I get sheets to fit? Do I have to go to a camping supplies store? The closest one is several miles away. TY