Mangar Elk lifting aid

Has anyone ever used one of these emergency lifting cushions?

My husband who is disabled, can stand and take just a few steps using a zimmer frame, had a fall yesterday whilst standing up with the aid of the zimmer. I can't lift him as he weighs 14st and all usual available help was too far away so I did what the OT and physio have advised and called an ambulance. Fortunately my husband wasn't badly hurt and I just needed help in lifting him back into his chair but this obviously meant he wasn't a priority for the emergency services so we had to wait an hour and a half for assistance. I am not moaning about the wait as I am only too grateful that they were able to lift him up and check him over and fortunately he did not need to go to hospital.

However from previous experience it is going to take a long time to get his confidence back to stand or attempt any walking. The ambulance crew asked if I knew about the Mangar Elk which you can slide underneath a person who has fallen and it can then be inflated to enable them slide into a chair or stand from the elevated position.

Our OT has never mentioned this lifting aid and I would welcome any advice from anyone who has used one or a carer or health worker who knows anything about them. They are very expensive but would be worth buying if only for the peace of mind and confidence that it would give us both.