I think I found an almost perfect substitute
I went to the Home Depot and bought a package of Self-Adhesive Foam and Vinyl Pads. Different sizes, but the one that I bought had black ones, different sizes. I just had to trim ,make a smaller circle out of any of the black ones, to slightly ,but barely overcover the hole, then I placed back the back cover on top of it. You should make sure that the pad isn't too thick. Mine were fine. I suppose, instead of even taking off the back, you could approach it by keeping the back on, cutting a round piece that would fit snuggly into the hole. Too boot, the sticky part, should more or less adhere to the exposed bits that are in the hole. I prefered the other way, because it adhered to the actual back of the phone,near the hole a lot better. Hopefully I helped those people find a better way, than using bic pens blunt end. I tried that , but not nearly as good as my method.
Vodafone 1605VPA CompactIII
Tytn WM 6
Schaps 4.31, , 6gb Sandisk card
Rom date: Will get it soon
Radio version: 1.51 SPL-2.10 Olipro