I don’t think so. Isn’t the homily supposed to be for the priest to speak his own words regarding the Scripture given–not to read the words of another person (unless he is reading a letter from the bishop or from the Pope that he is directed to read at Mass, that is).
In fact, I don’t believe that eulogies are given at funeral Masses (or should be–I mean, I have heard them from some priests but not from all, or even most, and the reason given me was that they were not supposed to speak particularly of the deceased but in a funeral Mass were to speak generally and in respect to the gospel passages or other Scripture, and not ‘particularly’ of a given individual and his life.) Eulogies of such type were supposed to be reserved either to the wake or after the funeral service.
I think what it comes down to is that Mass is the Mass. The Mass is all about Christ, it is about His sacrifice. It is not about John Jones’ life which we celebrate. (That doesn’t mean that we don’t love John Jones, or that this Mass is not in a way a ‘farewell’ to John. We do, and it is. . .but John is not the source and summit of the Mass, and John does not speak ‘from the grave’ in the priest reading John’s ‘farewell’ in place of a homily.)
However, I do think that one could write out some words --not for the priest to say, of course–that could be given as an insert in the bulletin, or framed above the casket at the wake, and read (outside the funeral Mass).