It's very early days with this, because I'm not sure if this is just a subset of wider GB polling, and therefore I don't know if the sample size is credible. But there appears to be a YouGov poll confined to the seats currently held by the Scottish Tories, producing the following results...
Voting intentions for Westminster (YouGov, respondents in Scottish Conservative-held constituencies only):
Liberal Democrats 12%
Brexit Party 5%
On a uniform swing, that would mean the Tories being wiped out completely in Scotland, although the seats currently held by John Lamont and David Mundell would be virtual dead heats.
Does this contradict this week's full-scale Scottish poll from YouGov suggesting the Tories would, on a uniform swing, cling on to three seats? Not necessarily. The Tories outperformed their 2017 national result in the seats they gained, so it's entirely conceivable the pendulum could swing back the other way and they could underperform their national result in those seats this time. The Lib Dem vote also looks relatively modest considering we're talking mostly about rural seats, so perhaps some Lib Dem supporters are willing to vote tactically for the SNP to get the Tories out.
If I was a betting man, though, I'd still say the SNP have a mountain to climb in the two Borders seats. Everywhere else the prospects are reasonably rosy.