Since Josef Bursik was recalled from his season-long loan by parent club Stoke City in November, Rovers have relied on a weekly emergency loan deal for Queens Park Rangers keeper Joe Lumley.
An emergency loan will be blocked off for Rovers next month as they are not permitted during transfer windows, meaning Moore will be forced to find a longer term option.
And he hinted at opening talks with QPR over taking Lumley for the rest of the season.
“We’ve got to go down the route of another loan goalkeeper,” he said.
“If we’re not to keep hold of Joe, we’ll have to seek another one.
“The situation is that Joe is in goal at the moment, he’s been performing well. He’s a goalkeeper that is now understanding what we do here and he’s a big part of that.
“We’ve got to discuss that with Joe. We’ll have a look at it and discussions will take place between both clubs.
“If not, we have to have a plan B in place and that is being put into work now.”
Pursuing a loan deal suggests Moore will continue to use academy graduate Louis Jones in a supporting role for the rest of the season.
Jones is seen as the long term goalkeeping solution for Rovers having made his senior debut this season. He has made four senior appearances in total.