I have mobility problems and have a hard time getting into the shower. I have seen Tinna body wash for sale online. Walgreens has never heard of the product. Walmart was the same way. Are there any other brands that might be sold in a big box shop or do I need to look at a place specializing in home health products?
Search for "no rinse shampoo" and "no rinse soap" or "no rinse body product" and you'll get a lot of hits. Walgreen, Walmart and other similar stores carry them.
You could also call a local DME, perhaps one affiliated with or in the same building as a hospital, and ask them.
The brand I've seen used most often is in rehab facilities and hospitals, but I don't remember the name. It comes in an orange and white bottle/jar/can.
If you do specifically want the Tinna brand, I would try to find the manufacturer, then contact customer support to ask which stores carry it.
Found some for you:
https://www.google.com/search?ei=a8dTXqz6F8SotQWlwp6YAg&q=tinna+no+rinse+products&oq=tinna+no+rinse+products&gs_l=psy-ab.3...240241.243389..243501...0.1..0.109.1915.21j2......0....1..gws-wiz.......0i71j0i273j0i131j0j0i67j0i10j0i22i30j0i22i10i30j33i160j33i299j0i13.NmGlpKeJUkI&ved=0ahUKEwjs25ntnernAhVEVK0KHSWhByMQ4dUDCAo&uact=5#spf=1582549088240
Aloe-vesta is a nice no rinse product.
The first was Bedside-Care No-rinse cleanser. It comes in both foam and spray bottles. It has a nice scent, and leaves the skin clean and fresh. Comes in 8-oz bottles and is great for low-volume use.
After Mom's needs got more intense, I switched to MedLine "Soothe and Cool Cleanse Total Body Cleanser." It comes in a gallon bottle, which saves a lot of money over the smaller spray or foam bottles. Worked just as well as the Bedside-Care brand, but with little or no scent.