Skip the boring, 3 hour long library sequence.
Instead just hand wave it away and say that it happened. Don’t specify exactly WHAT gear the party acquires based on the outcome of the research, just say that they acquired it already.
Cut to the actual encounter. At pivotal moments, have a flashback to the actual research time. Have the scholars make their rolls on the spot. The outcome of their roll (success OR failure) dictates waht the player characters pull to defeat the challenge.
The PCs have tracked the monster to its lair. They wish to set up an ambush using their newly acquired monster hunting gear. Flashback! Corbin rolls. Failure. Oh well, he thinks that making a ring of salt will defeat the monster! Cut back to the present. The party readies handfulls of salt packets.
The Vampire appears! Flashback. Miter’s character rolls History. Success! Fire will do the trick. Cut back to the present: all of the party’s weapons have the flammable quality.
The actual flashbacks don’t all have to be on the spot if it doesn’t make sense. If the monster of the week has a weakness to FIRETRUCKS, the party will obviously not pull one out of nowhere. Well, they COULD, that would be HILARIOUS: “suddenly, there’s a loud honking sound before the wall bursts in and a firetruck smashes into the monster! Everyone cheers!”