Metal lens hoods have been swept out of common usage by the conical rubber ones, which make more sense on SLRs, but there ae some possibilities and I recall some previous correspondance that you you should find if you trawl back through this forum.
Other than that, I guess the Leitz FISON is the obvious choice for the I-22.
40.5mm used to be a common size with German f2.8 lenses and there may be stuff on eBay. The Zeiss hood is well made but badly designed. Don't be tempted to buy one, it is sure to obstruct the finder badly, even on a FED-2.
Onother option is to get an adapter from 40.5 to a larger size. This is what I did to put my 46mm stuff on my Olympus digital. The local store had it in stock.
As for the 49.5mm, I suggest you check that it really is that. The chances of getting a third party hood that size would be slim indeed whereas if it is 49mm there should be something around. I thought the I-61 was 40.5mm.
Pentax made some nice solid hoods but they may have been plastic. They were flattened and thus would not obstruct the view too much, but I don't know what sizes they were and may have been for wide angle lenses.