'it completely changes the bacteria/flora in the babies gut to that of a formula fed baby, something you will then never completely get back. '
bollocks - did you even read the summary you posted?
It clearly states that
'in susceptible families, breastfed babies can be sensitized to cow?s milk protein
by the giving of just one bottle, (inadvertent supplementation, unnecessary
supplementation, or planned supplements), in the newborn nursery during the first three days of life (Host, Husby, Osterballe, 1988; Host, 1991)'
and
'relatively small amounts of formula supplementation of breastfed infants
(one supplement per 24 hours) will result in shifts from a breastfed to a
formula-fed gut flora pattern (Bullen, Tearle, Stewart, 1977)'
for a 10 week old, 1 night of formula is highly unlikely to harm him. HOWEVER, if you (the OP) are against it, then it is unnecessary - why does your DH need research to accept your feelings on the matter?