Necessity is the Mother of invention. Note the use of a miscellaneous bracket, piece of thin rock, support cord and cable ties to position my C-band LNBF just in the sweet spot of the dish focus. And I can swap between this LNBF and my Ku LNB quite quickly when I wish.
And check out this homemade bracket by RimaNTSS in Latvia:
And check out this homemade bracket by RimaNTSS in Latvia: