What I did was this: I melted down a "Fairy Liquid" [an English dishwashing detergent] bottle, made a couple of blobs of the plastic and then sat there with a hot soldering iron and melted holes in them so they'd fit on the tips of my injured fingers, kind of like thimbles.
When I got the caps to fit comfortably, I ended up with these big balls on the ends of my fingers, so I then proceeded to file them down with sandpaper until they were approximately the size of normal fingertips.
It took me quite a while to get them exactly right because they couldn't be too heavy or thick but had to be strong enough so they didn't hurt the ends of my fingers when I used them. When I had sculpted my "thimbles" to the right size and tested them I realized that the ends weren't gripping the strings so I cut up a piece of leather and fixed pieces to the ends of them. I then spent ages rubbing the leather pads so they would get shiny and absorb some oils and would help me grip the strings better. I filed down the edges so they wouldn't catch on anything and it worked!
Once I had done this it took me quite a while to get used to bending and shaking strings with those two fingers because I obviously couldn't feel anything. It was difficult to even know where my fingers were and where they were going. It was just a matter of practicing and persevering with it, using my ears to compensate for my lost tactile sense.
Hope this helps..☺
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