Rep. Philip M. Crane's (R-I11.) disaster-plagued campaign has come up with another problem: part of the list of 80,000 supporters he has spent almost $2 million building up is missing.

His advisers aren't sure whether someone walked off with the list when his entire senior campaign staff quit last week, or if they simply can't find where it was stored.

"They are finding some elements of the list," Bill Rhadican, a campaign consultant, said. "But they can't put it all together."

The list is Crane's most valuable political asset in his longshot bid for the Republican presidential nomination. It records the names of some 80,000 people who have responded to his direct mail appeals for campaign donations, and are likely to respond again.

With it, Crane is a viable candidate, capable of raising the millions of dollars necessary to finance a campaign. Without it, he is an obscure congressman from Illinois.

Employes of direct mail fund-raising expert Richard A. Viguerie, who has worked with Crane, apparently were unable to find the list after campaign manager Rich Williamson and other top advisers quit last week in a dispute over how Crane was running his campaign.