@marymelba - the leg lifter's are available online from Amazon, they run from $7 to $10. Mine are similar to the cheap blue $7 ones, the hospital staff gave me one each time I got my TKR's. Do a search for "leg lifter after knee surgery" It's just a long semi-rigid strap with a hand hold at one end, and a loop for your foot at the other. Along with helping you get into and out of bed, and elevating your leg on cushions on a recliner, it also is used for rehab exercises with leg lifts before you start getting your leg strength back.
It's possible a well stocked drug store might have them too. I got more use out of mine when I did rehab for a frozen shoulder last year, I could hang it over my shoulder to do behind the back arm pull ups. The foot loop was easier to hang onto than the towel they suggested.

I am sorry to hear you are still having so much pain. I wonder if it is aggravated by the swelling. I elevated most of the time I was in the recliner since I was captive there anyway. My PT guy said that icing for three times a day for 20 minutes is enough, but I iced for longer and more often in the early days, because it made it more bearable, even for sleeping (or trying to!) Also, the hospital sent me home with a large flexible ice pack with a soft removable cover with velcro straps to keep it in place. I think that ice pack was what kept me sane and as comfortable as I could expect to be.