I have this one. I like the weight of the handle, and I like that I'm able to change the blade from curved to straight. It doesn't look as fancy as some of the ones with wooden handles, but the blade is securely attached, and I like its functionality. The seller is actively engaged with customers on Amazon, which is good in case of questions and problems.
https://www.amazon.com/Bread-Lame-Designed-Stainless-material/dp/B079G7WC79/
As for blades, I have these. They're very sharp, and the box of 100 will last a long time. I can't imagine that other brands would be significantly better or worse, though. Just make sure the blades aren't oiled (I think that's more of an issue with single edged blades, and the blades used in utility knives).
https://www.amazon.com/Dorco-ST300-Platinum-Double-Blades/dp/B001MJSAJQ/
(ETA blade info)