Did a quick look on cap-friendly for some goalies that might be attainable. Seeing as Matt Murray was described as "ways away" by Keefe just a couple days ago, and Samsonov has a knee injury which could be anywhere from day to day, to months long absence.
Aaron Dell (SJS) - Dell has had NHL success in the past, but recent seasons haven't been kind. Solid first 3 games to start off the year in the AHL, and was previously signed by the Leafs before being claimed off waivers at the end of camp. James Reimer certainly one of the most stable options, and would cost more. - and no, SJS won't trade Reimer, he's currently the Sharks starter.
Michael Hutchinson (VGK) -
Anton Khudobin (DAL) - It's worth mentioning, in case DAL/TOR got a third team involved, but straight up likely isn't an option. Even if Dallas retained 50%, Khudobin would carry a cap hit of $1.667M, which isn't buriable when/if both Samsonov & Murray are healthy again. However, Khudobin has NHL experience, and is only 2 seasons removed from elite quality play. Would need to have double retention to be an option
Joonas Korpisalo (CBJ) - It's been a while since Korpisalo's 15-16 rookie season where he put up a .920 sv% in 31 appearances. At this point, he's a mid to low end backup. A pending UFA, and Columbus clearly running with Elvis/Tarasov as their tandem, Columbus likely would be okay allowing Korpisalo to get an opportunity elsewhere. It's not a great solution, but might be one of the more likely ones.
Cory Schneider (NYI) - This one is a bit of a whacky scenario to imagine, however Schneider had an extremely strong season in the AHL last year, and is off to a good start this year. There's obvious health concerns, and the Islanders GM isn't one for moving players to give them opportunities elsewhere - but it's not the biggest stretch in the world.
Louis Domingue (NYR) - For most of his career he's been a solid backup goalie. He's nothing special and can turn out .880 performances just as often as .910 performances. However he has a track record at the NHL level, which is what the Leafs need,
Dustin Tokarski (PIT) - Tokarski spent the last 2 seasons being second in command to Craig Anderson in Buffalo. This season through his first 6 games, he has a .945 for Pittsburgh's AHL affiliate.
Malcolm Subban (BUF) - Not much to say really. Subban is just okay. He was okay in Vegas, and okay in Chicago. He's likely fourth on the depth chart in Buffalo.
Magnus Hellberg (OTT) - Ottawa claimed Hellberg off of waivers earlier this year due to Cam Talbot going down with an injury. With Talbot back, the Leafs/Sens could hook up on another trade. With Artem Zub slated to possibly return next week anyway, Ottawa will likely be placing Hellberg on waivers regardless.